Trade of the most popular Indigenous fruits and nuts, threats and opportunities for their sustainable management around the Ivindo National Park (INP), Gabon

Sustainable management of forest resources in and around national parks continues to be a growing challenge in Gabon. Rural people living close by national parks continue to depend on those forest resources to meet their various livelihoods needs despite strict governmental restriction on access and use of forest resources, especially inside of national parks. Hence, most of these resources are mismanaged and overexploited while innovative mechanisms that would assist parks’ managers in sustainably managing these protected forests are lacking. A semi-structure interview was administrated to 79 sellers that were found in the three local markets located near the Ivindo National Park (INP), in the province of Ogooué Ivindo (Gabon). This survey aimed at clarifying the trade values of most of the popular indigenous fruits and nuts species and the sellers’ perceptions on resource decline for an improved management of resources inside and outside of the Ivindo National Park. From both inside and outside of the park, Coula edulis, Irvingia gabonensis and Dacryodes buettneri tend to be among the most sold wild fruits and nuts according to 82.3, 73.4 and 31.6% of the respondents respectively. I. gabonensis fetches the highest sale price in FCFA and represents the most important income provider to sellers followed by C. edulis and D. buettneri. Since social status of sellers such as marital status and ethnicity appear to be the driving factors to people’s entry to this trade, therefore they need all to be considered as key variables in regulating usages of these traded wild fruits and nuts. Despite the importance of indigenous fruits and nuts as source of income, resource decline have been acknowledged by almost all the sellers. Hence, sellers should be considered as key partners in identifying species in needs of conservation. Among the drivers of resource decline include the impacts of logging companies, climate change (unpredictability of rainfall), and unsustainable harvesting practices of the valued indigenous resources. Sustainable management of these valued indigenous forest resources call for a careful implementation of an innovative mechanism that would regulate demand and assist park managers in managing forest resources in a sustainable manner. Most critically, further studies need to look at the practical approach of setting up quotas based harvesting of these valued indigenous forest resources.


INTRODUCTION
Gabon, located in Central Africa, is endowed with a rich biodiversity including dense forest covering 25,767 000 ha, more than 80% of the total national territory (Caballé, 1978).This dense tropical forest supports the development of the forestry sector and the livelihoods of many local populations (Kaimowitz, 2003;Beauchamp and Ingram, 2011;Jamnadass et al., 2011;Ingram et al., 2012;Lescuyer et al., 2012;Tieguhong et al., 2012) including Non Timber Forest Products (NTFPs).NTFPs provide livelihoods to local people which include trees bearing fruits such as indigenous fruits and nuts.These forest products are one of the most important traditional resources and represent major sources of foods and income generation for people in the country (Walker and Sillans, 1961;Bourobou-Bourobou, 1994;Bourobou-Bourobou and Posso, 1995;Pineau, 1995;Corblin, 2006;Viano, 2005).
The Gabonese government has made tremendous efforts towards protecting the country's rich biodiversity and promoting its sustainable management through establishing a network of 13 national parks (covering nearly 11% of total national land area) throughout the country since 2002 (AFDB, 2011).This conservation effort has started since colonial period with Lopé reserve and the Ipassa Makokou Biosphere Reserve's establishment in 1946 and 1979 respectively.The establishment of national parks' represents therefore one of the traditional approach adopted by the Gabonese government for strict protection and sustainable management of its natural resources.However, one of the often mentioned constraints of this approach is that it negatively affects the livelihoods of local people living nearby those protected forests in terms of access and use of forest resources that get to be used by them to meet their various basic needs (Okouyi Okouyi, 2006;Lescuyer, 2006;Sassen and Wan, 2006;Corblin, 2006, Viano, 2005).
In addition, mechanism that could help resources managers to regulate usages and market demands over valued forest resources such as indigenous fruit trees and nuts in all core areas of national parks are new in most developing countries.In case such mechanisms are available they do not often contribute to improve the livelihoods of forest dependent people in most cases (Laird et al., 2010a).In developing countries such as Nepal, the importance of non timber forest products for rural communities has been overlooked and available governmental legislations have contributed to poorly regulate resources extraction, use, trade and marketing of these forest products leading therefore to resources decline and negative impacts on the livelihoods of resource users generally (Pandit et al., 2004;Subedi, 2010;Uprety et al., 2011).
Scholars such as Laird et al. (2009) and Laird et al. (2010a) have pointed out factors that might contribute to undermine successful implementation of governmental forest policies including: (i) the contradicting nature of the forest policies with regards to forest tenure and property rights, (ii) the poor stakeholders' consultations regarding the implementation of projects that might affect their livelihoods, and (iii) the lack of depth analysis of the complexity of factors that might affect the sustainability and equity in resources access and use while designing forest resources management plans.Other driving factors stressed by Larsen et al. (2000), Chhetri (2009), Kunwar et al. (2009), Pokharel (2010), Uprety et al. (2011) and Patel et al. (2013) include: (i) the non recognition of legal traditional rights of collectors over harvest of the forest products, (ii) the lack of effective involvement of local people in forest resources management and policy elaboration process.
Since poor forest policy's implementation can indirectly lead to deforestation and unsustainable use of forest resources, therefore avoiding such issue and its negative impact on local people's livelihoods has led several scholars to suggest sustainable use of resources as a viable management's mechanism that would more likely reconcile biodiversity conservation (slowing deforestation) and enhancing local people's livelihoods (Arnold and Pérez, 2001;Ahenkan and Boon, 2010;Brussaard et al., 2010;Gondo et al., 2010;Laird et al., 2010a;Laird et al., 2010b;Powell et al., 2010;Rabbi et al., 2010;de la Torre et al., 2011), Laird et al., 2011;Mutenje et al., 2011).
In Gabon for example, policy and legislations regulating access and usages of forest resources are available for forests and national parks, as a part of natural resources management system of the country (Forest Code of 2001; the National Parks Law of 2007; decree on Customary Rights Law of 2004).Under such policy and legislations, access and use of forest resources is free in the transition area, regulated in the buffer zone, and strictly prohibited inside of all national parks of the country (Gabonese Republic, 2007).In addition, available studies country wide have poorly focused on assessing people's perceptions on access and use of wild traditional forest products including fruits and nuts that are gathered from indigenous trees on one hand and to determine their economic value on the other hand as an approach to regulate market demand and improve forest resources management in the country.
Moreover, the poor policy makers' knowledge on what are the most valued forest resources of the park also contributes to undermine the correct management of national parks, given that some of these forest resources (indigenous fruit and nuts) are pivotal to the livelihoods of the rural communities living near national parks in Gabon (Walker and Sillans, 1961;Bourobou-Bourobou, 1994;Bourobou-Bourobou and Posso, 1995;Pineau, 1995;Corblin, 2006;Viano, 2005;Okouyi Okouyi, 2006;Lescuyer, 2006;Sassen and Wan, 2006) and throughout Africa (Leakey et al., 2005;Arnold et al., 2011;Jamnadass et al., 2011;Sunderland, 2011).Consequently, any attempt towards improving the management and conservation of forest resources of national parks including in the Ivindo National Park (INP), one of the newly established national parks, requires a clear understanding of the economic and social value of the most traded indigenous fruits and nuts products and the traders' perceptions on the current status of those traditional resources from the wild.Therefore, this study represents a most necessary starting point to inform policy makers' and raise their awareness on the decline of these forest resources, assisting park managers on pursuing a sustainable management of the parks' resources.

Study area
The study was conducted in three local marketplaces around the commune of Makokou, provincial city of the province of Ogooué-Ivindo (north-eastern of Gabon) that is located close by the Ivindo National Park (INP) with geographical coordinates of (0 23'-0 33'N, 0 42'-12 49E) in Central African region (Figure 1).The region of Makokou is characterized by an equatorial climate, marked by high humidity, high rainfall of 1,700 mm and temperature averaging 24C year round (IRET/ CENAREST, 2003).The population of the region estimated at about 15,000 people includes many ethnic groups such as the Bantus and the Baka pygmies.The Bantus break up into small groups including Fang, Kwélé, and Kota with Fang and Kota being the dominant ethnic groups in the area (Betti, 2013).
The forest of the region of Makokou belongs to the Guineocongolian phyto-geographical type (Amalfi et al., 2010;Yombiyeni et al., 2011;Sonke et al., 2012) with abundant fauna and floristic resources, including 1,200 floral species already inventoried.Among valuable timber and non-timber forest products commonly encountered around the study area include indigenous fruits and nuts trees.These forest products known as multiple uses trees species are considered by local people as major sources of timber (Dacryodes buettneri) and foods, income generation and healthcare (Coula edulis and Irvingia gabonensis) (Lescuyer, 2006;Sassen and Wan, 2006;Corblin, 2006;Viano, 2005).
The current Ivindo National Park (INP), one of the oldest protection areas in Gabon, is selected as a case study of typical national park of the country.The Ivindo National Park was formerly known as Ipassa Biosphere Reserve of 10,000 ha that was established in 1979 and composed of three main areas: a central core area of 10,000 hectare, a 2 km of wide band as buffer zone, and a 3.5 km of transition area (Gabonese Republic, 1971).The reserve area was extended to become the current Ivindo National Park covering an area of 300,000 ha today.Although, rules and regulations of the national parks exist under the Forest Code of 2001, the decree on Customary Rights Law of 2004 and the National Parks Law of 2007, however, access and use of resources are strictly prohibited, especially inside of all core areas of the national parks (Gabonese Republic, 2001Republic, , 2004Republic, , 2007)).In addition, firewood is the only forest product allowed to be collected freely from the national parks to sustain the livelihoods of rural people while other forest products even non-timber forest products including nuts and fruits from indigenous trees are prohibited to be consumed in the core area, and their extraction is regulated in the buffer zone (Gabonese Republic, 2007).
The consumption, use and trade of indigenous fruit and nuts have been central component of the livelihoods of majority of rural communities throughout Africa (Akinnifesi et al., 2006;Leakey et al., 2005) including in Gabon, however, there is a scarcity of studies assessing the current economic value of the most popular indigenous fruits and nuts, and traders' perceptions on resource decline to regulate market demand and improve the management of national parks' resources.In addition, the observed mismanagement and the decline of the resources as to do with poor policy makers' knowledge on what are the valued forest resources gathered from the wild.

Species selection and data collection
C. edulis, D. buettneri and I. gabonensis represent the three indigenous fruits and nuts that were selected for this study as a result of their popularity, their higher market price and their consumptive values that were evidenced during the previous household survey ( Mikolo and Ito, 2014).The data were obtained through different techniques including; key informant interview and a semi-structure questionnaire that was administered to seventy nine sellers throughout the three local markets that were identified within the commune of Makokou as followed: Central market (n=31), Mbolo market (n=17) and Zoatab market (n=31).Questionnaire administration was based on a one hundred percent sampling strategy while participation of sellers in the interview was voluntary.
This work was constructed around the following four aspects: (1) the socio-economic profile of sellers and forest products outsourced, (2) the trade values of the most popular indigenous fruits and nuts, (3) the relationship between trade values of the most popular indigenous fruits and nuts and the socio-economic profile of sellers, (4) the cross tabulation relationships between sellers' awareness on resources decline, drivers of resource decline and opportunities for improving sustainable management of forest resources around the Ivindo National Park.

Data analysis
Statistical analyses were conducted using SPSS, v17.0 to generate descriptive statistics such as means, frequency tables, and percentages and cross tabulations with regards to the above four aspects.Non-parametric statistics (Mann Whitney U tests and Kruskal Wallis tests) were performed to test differences between amounts of the resources sold, the economic value of the traded resources and the socio-economic profile of the sellers.

Social status of sellers and forest products outsourced
In total, seventy nine sellers representing 77% of identified respondents have voluntary participated in the market survey.Table 1 shows the social status of sellers and forest products outsourced in the study.Since 95% of the respondents were female respondents therefore the trade of most popular indigenous fruits and nuts tend to be highly gendered segmented as is the case in many regions of Central Africa.In Cameroon for example, the study of Perez et al. (2002) found that the traded forest product is gendered related and that gender differences found depends on business size, product specialization, market strategies involved as well as profit margins generated.Other factors driving gender differences in the trade of forest products include the level of people's involvement in the segment of the value chain, availability or not of regulations measures on customary rules and legal regulatory norms guiding access and use of forest resources (Ingram et al., 2014).However, depending on the physical nature of the activity, female respondents tend to be less dominant in forest products related enterprises such as woodcrafts (Shackleton andShackleton, 2003, 2004;Nkuna, 2004;Paumgarten, 2005;Mikolo Yobo, 2007;Christian et al., 2008).On the contrary, the higher involvement of female respondents in this trading activity has probably to do with their needs to supplement households' incomes.
The majority (96%) of people interviewed originated from Gabon compared to other nationalities probably because of their proximity to the resources added to the fact that they are probably more knowledgeable about where to find these valued forest products from the wild than foreign people.Almost sixty percent of the respondents are involved in the trade on a part time basis while the rest are full-time sellers.Thus, trading of forest resources on a part time basis may represent an important livelihood strategy sets in place by respondents since it allows them to carry multiple livelihoods activities for meeting other households' needs (Shackleton andShackleton, 2003, 2004).
The collectors-sellers types of respondents tend to represent the majority (96%) of people encountered in the study compared to the sellers' type of respondents only (4%).It was found in the surveyed area that poorly educated people tended to dominate the trade of the most popular indigenous fruits and nuts since the majority (84%) of them have no education (8%) while 76% of respondents have reached primary education.Although, the net primary school enrolment's rate is relatively high (96%) in the country, however, this rate tends to drop while people reach secondary and university studies as a result of internal issues within the Gabonese education's system (World Bank, 2006).Thus, this poor education attainment may have driven sellers to enter such a trade as evidenced by Nkuna (2004) in the case of Hazyview area of the Mpumalanga Province (South Africa).He showed that people with no or poor education are more likely to get into the informal forest trading activities such as woodcrafts than in the formal trading sector.As a result, low education may have driven sellers' involvement into the trade of wild fruits and nuts given that people with poor education are less likely to get an employment in the formal sector in Gabon.
The trade of indigenous fruits and nuts is dominated by Kota ethnic group (58%), one of the major ethnic groups in the region, while others ethnic groups such as Mahongwé (19%), Fang (6%), Shamayé (6%), Kwélé (5%), Foreign (4%) and Sake (1%) have also managed to enter into this trade.In addition, the trade of the most popular indigenous fruits and nuts is dominated by non-married people representing altogether almost (80%) of the respondents including concubine (44%), widow (19%), and single people (15%) while married people represent the rest.Seventy percent of the respondents have mentioned entering the informal trade of indigenous fruits and nuts as a result of lack of employment while other respondents have stressed additional income sources (28%) and meeting consumers' needs (2%) as the driving factors to their entry to this trade.In the case of rural areas of South Africa for example, factors such as people's proximity to the location of the resources and the lack of additional costs (except labor related one) involved in resources extraction have been cited as drivers of people's entry to the trade of marula (Sclerocarya birrea) beer (Shackleton andShackleton, 2003, 2004).In Gabon, the state seems to fail to absorb the rising numbers of new entrants into the formal economy given the relatively higher level of unemployment rate 30% among the youth population with age ranging from 16 to 25 years old and poverty level estimated at 33% in the country as a results of the high income inequality among the Gabonese people (GDS, 2008; Mc Kinsey report, 2014).Since a large proportion of the population remains poor (especially in rural areas) and that they find difficulty in finding proper employment therefore the informal trade of indigenous fruits and nuts may still continue to provide livelihood opportunities to these impoverished rural people and their families throughout the country.
The average number of years of experience of the sellers in this study is 9±7 with minimum=0; maximum=25 years.Given that average age of sellers was estimated at 43±11 with [minimum=23; maximum=71] years therefore these people are mostly adults who may represent a potential working force for the formal sector.Since average family size is estimated at 6±3 with [minimum=1; maximum=11] therefore it represents a non-negligible labor force at the disposal of the sellers and their families, especially in time of resources outsources.As a result, family members plays a potential role in helping the main sellers in resources collection from the wild and their sale at marketplaces (Fu et al., 2009;Shackleton et al., 2011;Katel and Schmidt-Vogt, 2011;Asfaw et al., 2013).
Regarding resources outsourced, the majority (96%) of respondents has acknowledged collecting indigenous fruits and nuts from different trees that were found either inside or outside the park.As the collection of indigenous fruits and nuts depend on resources availability therefore the future management of these wild forest products has to be directed to either inside or outside of the park and or to both inside-outside of the park.

Commercialization of the most popular indigenous fruits, nuts and sellers' livelihood dependence on valued resources
Table 2 shows variations in amounts of forest products sold, gross mean income generation and market price of the most popular indigenous fruits and nuts in the study.Although, all (100%) the respondents are involved in the sale of all the three most popular indigenous fruits and nuts, however variations exist with regards to mean amounts of resources sold, total gross mean income generated per season and total mean price per kg given range differences observed between minimum and maximum.The popularity of these forest products is also evidenced by the proportion of respondents engaged in their sale.Since 82 and 73% of the respondents are engaged in the sale of C. edulis and I. gabonensis respectively therefore they can be considered as the most popular indigenous fruits and nuts while Dacryodes buettneri represents the least popular species given that (32%) of the respondents are involved in their sale.
For the less popular indigenous fruits and nuts namely Dacryodes buettneri, average total amounts of resources sold per season and gross mean income generated were relatively lower than of the two most popular indigenous fruits and nuts (Coula edulis and Irvingia gabonensis) in terms of average total amounts of resources sold per season and gross mean income generated.Out of the three wild indigenous fruits and nuts, Irvingia gabonensis (600 FCFA per Kg) is fetching the highest mean market price followed by Coula edulis (400 FCFA per kg) and Dacryodes buettneri (300 FCFA per Kg).Consequently, wild fruits and nuts that are fetching the highest market price are also those ones that are being sold and generate most gross mean income per season, especially Irvingia gabonensis and Coula edulis.In other words, sellers tend to depend more on wild fruits and nuts of a higher market prices.
Resource users' dependence on forest resources of higher economic values is not without any negative ecological impacts on resources base and on local people's livelihoods (Peres et al., 2003;Ticktin, 2004;Belcher and Schreckenberg, 2007), especially absence of controlled resources management.However, its negative ecological impacts on resources tend to depend on trees parameters such as parts of the plants use, harvesting practices and intensity, inadequate management practices (Hall and Bawa, 1993;Ticktin, 2004;Uma Shaanker et al., 2004).In the case of this study, the trade of these valued wild fruits and nuts seems to have negative impacts on resources' availability since most of the sellers have acknowledged that these forest resources are declining from the wild.Thus, alleviating such negative ecological impacts on resources base has driven some scholars such as Syampungani et al. (2009), Hirsch et al. (2011), Lewis et al. (2011), andMcShane et al. (2011) to suggest a win-win approach as a way to reduce biodiversity decline and enhance livelihoods of forest dependent people.
In the case of Gabon, such an initiative aiming at improving biodiversity conservation and securing the livelihood local people (at the same time) is relatively recent.Indeed, the Gabonese government has made tremendous efforts in linking biodiversity conservation and livelihood security of local people by banning logs harvesting and commercial trade of five multiple (timber and non-timber forest products) uses plant species including Poga oleosa (Afo), I. gabonensis (Andock), Tieghemella Africana (Douka), Baillonella toxisperma (Moabi) and D. buettneri (Ozigo) until 2033 (Gabonese Republic, 2009).Among the list of the prohibited species include two of the target tree species of this study, especially Irvingia gabonensis and Dacryodes buettneri.The former represents the most sold indigenous nuts while the latter is the least sold indigenous fruits as a result certainly of consumers' wealth and price that they can afford for them.
Some of the drivers of households' consumption of forest resources such as wildlife include wealth and price of the goods (Wilkie and Godoy, 2001;Wilkie et al., 2005;Shackleton and Shackleton, 2006;Eniang et al., 2008;Fa et al., 2009;Godoy et al., 2010;Brashares et al., 2011;Foerster et al., 2012).Indeed, the consumption of such forest resources augments with rising of households' wealth and that while price of these forest products goes up its consumption diminishes.Thus, controlling the combined effects of such drivers on resources' consumption and its potential impact forests resources has led Wilkie et al. (2005) to suggest proper taxation coupled with better law enforcement as a valuable solution to overcome the issue of resources decline.According to East et al. (2005), understanding the in-depth causes driving demands of such wild forest products represents one of the starting point to solve the related effects of household wealth on consumption of forest resources.
In the case of this study, the high selling price of I. gabonensis and C. edulis (comparatively to Dacryodes buettneri) that were observed has certainly to do with the lower availability of these forest resources from the wild.Indeed, a recent ecological study carried out by Christian and Ito (2014) has shown that I. gabonensis and C.edulis, two of the most popular indigenous fruits and nuts, are in lower availability inside and outside of the park as a result of past anthropogenic pressures.Consequently, the scarcity of Irvingia gabonensis and Coula edulis from the wild may have contributed to increase their selling price at market.One of the direct consequences of the uncontrolled trade of wild forest products (especially those in lower availability) is its negative ecological impacts on species population (Ticktin, 2004) and on people's livelihoods (Eniang et al., 2008).Overcoming such negative impacts on forests and local people's livelihoods has led scholars such as Bennett et al. (2007), Sims (2010), Mukul et al. (2010), Duchelle et al. (2012) to suggest sustainable use and promotion of the commercial extraction of forest products as a viable solution to reconcile biodiversity conservation and livelihoods security of rural peoples in some cases Yobo and Ito. 91 Regarding this study, viable solutions to regulate the trade of most popular indigenous fruits and nuts are suggested at the end of this paper.

Relationship between mean amounts of wild fruits and nuts sold, their gross mean income generation and socio-economic profile of sellers
Tables 3 and 4 investigated the relationship between mean amounts of wild fruits and nuts sold and socioeconomic profile of sellers on one hand and the relationship between gross mean income of these wild forest products and socio-economic profile of sellers on the other hand.The results of these analyses showed that no significant differences were found between each of the socio-economic profile of the respondents including gender, nationalities, sellers' types, job's type and education level and mean amounts of resources sold through Mann Whitney tests and Kruskal Wallis tests.In addition, no significant differences were also found between the previous socio-economic profile of the respondents and gross mean income generation.This may imply that gender, nationalities, sellers' types, job's type and education level of the respondents have no influence on the amounts of resources sold and income generated from their trade.
On the contrary, significant differences were found between ethnic groups and each of the following variables including mean amounts of resources sold (X 2 = 15.90, p= 0.01) and gross mean income generation (X 2 = 14.06, p= 0.02) through Kruskal Wallis tests (Tables 3  and 4).Indeed, Saké and Kwelé ethnic groups all together tend to sell significantly less mean amounts of wild fruits and nuts and generate also less gross mean income from not only all the three wild species but also for each of the wild forest products than other ethnic groups including Fang, Kota and Mahongwe.The above result stresses also that ethnicity in terms of social knowledge of the respondents represents a key driving factor to people involvement into the trade of wild fruits and nuts.
Since Kota, Mahongwe and Fang (the dominant ethnic groups) tend to be highly dependent on the wild forest products therefore resources management has to be based on ethnicity dominance in the area.Community organizations based on ethnic groups may represent a good example of informal institutions arrangement, especially with regards to their contribution to sustainable management of natural resources (Leach et al., 1999).
In such approach, successful resources management may require those informal bundles of rights in terms of property rights and resources ownership as well as the roles and responsibilities of resources users are clearly defined and that they are effectively devolved to local users groups by the state (Larson and Ribot, 2004;Hartter and Ryan, 2010;Lambini and Nguyen, 2014).Indeed, the effective devolution of policy tenure, power and responsibilities to local resource users has to contribute to yield collective action and equity in resources management and stakeholders' involvement in decision making over forest resources (Larson and Ribot, 2004).In Gabon, community participation in forest and national parks resources management has been acknowledged by both the Forest Code of 2001 and the National Parks of 2007; however, the transfer of rights to local groups of users appears not to be effective on the grounds.As a result, capacity building of institutions is needed to strengthen their roles in resources management.Significant differences were also found between marital status and each of the following variables including mean amounts of wild fruits and nuts sold (X 2 =9.19, p= 0.01) and gross mean income generation (X 2 =7.58, p= 0.02) using Kruskal Wallis tests (Tables 3 and 4).This may imply that widow respondents tend to sell and generate significantly less income from wild fruits and nuts from C. edulis and D. buettneri than others marital statuses of respondents in the study.Since marital status is driving sellers' dependency on the trade of wild fruits and nuts therefore it needs to be taken into account in the future design of forest resources management in the area.
In the case of this study, limiting access to members of the same household alone or excluding other potential users may contribute to undermine the successful management of forest resources unless well-defined and clear rules directed to regulate resources use are set among community members (Ostrom et al., 1999;Poteete and Welch, 2004).Consequently, in that process, social costs and conflicts caused by such exclusionary approach have to be avoided (Lele et al., 2010).Avoiding such pitfalls while improving resources management has led scholars such as Ostrom (1999), Charnley and Poe (2007) and Lele et al. (2010) to take into account policy based on resources tenure and property rights changes.
In Gabon, the effective devolution of some responsibility and authority to the local community is less likely to happen given that the Gabonese government has retained the exclusive property rights and ownership over forests and land.Indeed, the ownership rights over forests have never been granted to the local communities by the Gabonese government in the country except a user fruits rights (Gabonese Republic, 2001Republic, , 2007)).One of the often mentioned concerns with regards to the lack of ownership over forest resources is that local communities become more vulnerable and exposed to issues of state's land grabbing (Wily, 2011).Avoiding such issue has led Mudekwe (2007) to suggest the need for forest policy changes so that it reflects the current level of local people's dependence on forest resources upon which they depend on for years in Zimbabwe.In Gabon, the government has not yet embarked on such forest policy changes yet.

Awareness on resources decline, rational and suggested solutions to overturn such issue
Table 5 shows the relationships between sellers' awareness on resources decline, rational of their decline and suggested solutions to successful overturn such issue.Regarding respondents' awareness level, almost all sellers were aware of the decline of I. gabonensis, C. edulis and D. buettneri according to 97, 94 and 92% of the respondents respectively.Since sellers have a high level of awareness or ecological knowledge on the decline of these fruits and nuts species from the wild therefore they need to be considered as key partners in identifying species in need of conservation and their sustainable management (Gunatilake et al., 2012) at local level.At state level, the issue of resources decline is well known from the Gabonese forest's administration and the state given that a policy initiative aiming at sustainably managing forest resources has led to the ban of harvesting and commercial trade of the five multiple use species such as Poga oleosa (Afo), Irvingia gabonensis (Andock), Tieghemella Africana (Douka), Baillonella toxisperma (Moabi) and Dacryodes buettneri (Ozigo) (Gabonese government, 2009).Among those species include also two of the valued wild fruits and nuts of this study, especially I. gabonensis and D. buettneri.
In the case of this study, the drivers of resources decline are multiple.Among mentioned drivers include climate changes (seasonality changes, unpredicted rainfall) according to 38-43% of the respondents followed by logging companies' activities (selective and uncontrolled harvesting) according to 30-34% of the interviewees then unsustainable harvesting (no norms of harvesting) as acknowledged by 28-30% of the people interviewed (Table 5).Past and current anthropogenic pressures including land clearing for agricultural fields' establishment based on slush and burns and logging companies through selective logging operations and uncontrolled illegal logging have all certainly contributed to the decline of these multiple use timber and non timber forest products from the wild (Lescuyer, 2006, Sassen and Wan, 2006, Corblin, 2006, Viano, 2005).Indeed, locations of forests that are actually found inside and outside of the Ivindo National Park have been granted to logging operations by the forest department until 2004 and that local people get to use forest resources in those locations even before the park was gazette in 2002 (Lescuyer, 2006).
Around the Miombo woodlands in Mwekera area (Zambia), the study of et al. ( 2009) has contributed to highlight drivers of resources decline including the absence of rules or norms guiding harvesting of wild fruits species, deforestation caused by charcoal extraction and expansion of land for agriculture purposes.Consequently, the loss of certain species of trees from the forest may have serious livelihoods implications for rural people who depend on those forest resources.In other words, fewer trees may mean less forest products upon which local people would derive foods and income from for household livelihoods maintenance.The issue of loss of forest and its negative impacts on local people livelihoods is even more enhance in absence of domestication initiatives and alternatives livelihoods provision by the state to those people (Kalaba et al., 2009).
In this study, some of the solutions to overcome the issues of resources decline have been suggested by the respondents themselves and are among the following "Better climate", "Deforestation reduction" and "Sustainable use" according to 38-43, 30-34 and 28-30% of the respondents respectively (Table 5).Indeed, improving the management of forest resources inside and outside of the park through a "Better climate" driven by the unpredictability of rainfall might be a less plausible solution to achieve on the ground due to difficulty in predicting rainfall.According to Dale et al. (2001), climate change can have an impact on forests structure and composition on one hand while it influences also the severity and magnitude of forest disturbances through rainfall shift on the other hand.
Regarding the others two suggested solutions to overcome the issue of resource decline including, the "reduction of deforestation" through the ban of logging activities inside of the park might contribute certainly to lower the impact of past anthropogenic pressures on the population of species.However, this suggested solution could not contribute to stop people from accessing and using illegally these forest resources in the long term as a result of several issues including the lack of: (i) resources ownership granted to local people by the state, (ii) domestication initiatives to alleviate household dependence on resources base, and (iii) alternative livelihood provision to the households in the area.
Regarding the last suggested solution and knowing that one of the key concerns of local people and parks' managers is the increasing scarcity of valued forest resources including fruits and nuts species from the wild therefore "Sustainable use" may represent a viable solution to overcome the observed issue of resources decline.In Gabon for example, since the country has turned towards the diversification of its economy through the development of Non Timber Forest Products based enterprises it is therefore crucial for the Gabonese government to take into consideration such sustainable use mechanism as a part of the country innovative approach to regulate and overturn issue of resource decline for both livelihoods sustainability and biodiversity conservation.
Until such a mechanism is in place, several trials and errors experiments are still needed to be carried out before it being widely used throughout the country as a magic solution.Achieving that would more likely ensure future access of forest resources for local people while pursuing at the same time government conservation's efforts as suggested by Mudekwe (2007) in Zimbabwe.Others options falling within sustainable use management of these valuable wild fruits and nuts species may include setting up quotas over harvesting of valued forest resources, restocking of wild species coupled with the implementation of domestication initiatives (local planting) of these forest products in the fields (Maghembe et al., 1998;Leakey et al., 1994;Akinnifesi et al., 2006).Among others valuable solutions to lower local people's dependence and pressure on the wild forest products may also include provision of alternative income sources to local people through proper incentive (DeFries et al., 2007;Davidar et al., 2010).Above all, this study has come up with the following mechanism (author suggestions) as a way to regulate sustainably the trade of the three valued wild fruits and nuts species gathered from different locations of the Ivindo National Park as shown (Table 5).

Conclusion and recommendations
The contribution of wild indigenous fruits and nuts gathered from different locations of the Ivindo National Park in sustaining the livelihoods of sellers has been clearly shown in this study since these forest products represent an integral part of the livelihoods of rural sellers as source of income generation.Coula edulis and Irvingia gabonensis appear to be the most popular traded wild fruits and nuts with regards to the proportion of people involved in the trade, mean amounts of resources sold, gross mean income and their marketed price while Dacryodes buettneri is acknowledged as the least popular fruits species.
Since I. gabonensis fruits species is fetching a higher market price followed by C. edulis and D. buettneri therefore it can be stressed that traders depend most on forest resources of higher market value in the study.This study also contributes to show that traders' dependency on forest resources of higher market value is not without any consequence on outsourced resources from the wild.Furthermore, since marital status (social) and ethnicity (affinity with forest resources) of sellers seems to drive people's involvement into the trade of wild indigenous fruits and nuts for income generation therefore these key variables need to be considered in regulating such commercial trade of forest products in the study.
Despite the importance of wild indigenous fruits and nuts as source of income, resources decline have been acknowledged by almost all the sellers.Drivers of resources decline include the impacts of logging companies (selective logging), climate change (unpredictability of rainfall) and unsustainable harvesting practices of these wild indigenous fruits and nuts' species.In addition, achieving conservation and sustained livelihoods of rural sellers call for a careful implementation of the mechanism suggested to regulate market demands of these valued wild resources in the study area.Moreover, further studies should aim at looking on the practical approach of setting up quotas based harvesting of these wild indigenous fruits and nuts for resources management purposes.

Figure 1 .
Figure 1.Surveyed marketplaces around the commune of Makokou in the province of Ogooué Ivindo, north east Gabon.

Table 1 .
Social status of sellers and forest products outsources (N=79).
n, number of sellers who have exactly participate to the survey.

Table 3 .
Economic value and amounts of traded forest products by sellers social status in the study area.

Table 3 .
Contd.Season* corresponds to harvesting season.Mann Whitney U tests were performed for variables related to Gender, Nationality, trader types and job opportunities types.Kruskal Wallis tests were performed for variables related to educational levels, ethnicity, marital status and reasons for entering the trade.

Table 4 .
Sellers' awareness and rational for resources decline and suggested solutions for successful use and management of the resources.

Table 5 .
Recommendations on potential regulation of commercial resources of the park.