Abstract
Human induced habitat destruction and modifications cause losses of aquatic and terrestrial biodiversity. The Congo and its islands constitute special ecosystems and have been used by humans for many purposes over centuries. However, little is known about the effects of these human activities on the fish species richness and distribution. This study is a preliminary assessment of island habitat types, fish species richness and effects of human activities on fish distribution. Islands were randomly selected to describe island habitats, to collect fish specimens using nets and to record human activities, including agriculture. Terra firma island habitats were mostly mixed mature forest with clay and muddy substrates. We captured 29 fish morphotypes (13 families). Clariidae and Cyprinidae were widely distributed whereas Alestidae, Chanidae, Malapteridae and Polypteridae were restricted in their distribution. Humans permanently settled 76 % of the islands and 70 % were cultivated. Permanent human settlements and agriculture were related to erosion on ~50 % of islands. For reasons that are difficult to explain at this stage, fish morphotype richness decreased with increasing field sizes, warranting further investigations.
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References
Abrahams M, Kattenfeld M (1997) The role of turbidity as a constraint on predator-prey interactions in aquatic environments. Behav Ecol Sociobiol 40:169.174
Amesbury SS (1981) Effects of turbidity on shallow-water reef fish assemblages in Truk, eastern Caroline Islands. Proc 4th Int Coral Reef Symp 1:155–159
Aveling C, Botaka B, Hall JS, Hart JA, Hart TB, Inogwabini BI, Plumptre A, Wilkie D (2003) Democratic Republic of Congo Environmental Analysis - Final Report. Type-scripted report submitted to the United States Agency of International Development, Washington DC, United States of America
Bailey RG (1986) The Zaïre River system. In: Davies BR, Walker KF (eds) The ecology of river systems. Junk Publishers, Dordrecht, pp 201–214
Bain MB, Finn JT (1988) Streamflow regulation and fish community structure. Ecology 69:282–292
Balmford A, Green RE, Jenkins M (2003) Measuring the changing state of nature. Trends Ecol Evol 18:326–330
Banister KE (1986) Fish of the Zaïre system. In: Davies BR, Walker KF (eds) The Ecology of River Systems. Junk Publishers, Dordrecht, pp 215–224
Berg A (1971) Rôle écologique des eaux de la cuvette congolaise sur la croissance de jacinthe d’eau. Révue Scientifique d’Outre-Mer. Classe Sciences Naturelles et Médicales. Mémoire, ms T12: Fascicule 3:1–120
Boulenger GA (1898) Matériaux pour la faune du Congo. Poissons nouveaux du Congo. Première Partie. Mormyres. Annales du Musée du Congo (Série Zoologie) 1:1–20
Boulenger GA (1900) Matériaux pour la faune du Congo. Poissons nouveaux du Congo. Sixième Partie. Mormyres, Characins, Cyprins, Silures, Acanthoptérygiens, Dipneustes. Annales du Musée du Congo (Série Zoologie) 1:129–164
Brncic TM (in press) Prehistoric forest dynamics and human impacts in the Lake Tumba region. In: Inogwabini BI (ed) Conservation in large scale landscapes: A case study from the Congo Basin. Cambridge University Press
Brooks EGE, Allen DJ, Darwell WRT (2011) The Status and distribution of Freshwater Biodiversity in Central Africa. IUCN Gland (Switzerland) and Cambridge (UK)
BSP (Biodiversity Support Program) (2001) The Integration of Biodiversity into National Environmental Assessment Procedures: National Case Studies, Cameroon. United Nations Development Program, United Nations Environment Program & Global Environment Facility
Burnham KP, Anderson DR (1992) Data-based selection of an appropriate biological model: The key to modern data analysis. In: McCullough D, Barrett R (eds) Wildlife 2001: Populations. Elsevier, New York, pp 16–30
Burnham KP, Anderson DR (1998) Model selection and inference: A practical information theoretic approach. Springer-Verlag, New York
Burnham KP, Anderson DR (2002) Model selection and multimodel inference: A practical information-theoretic approach, 2nd edn. Springer-Verlag, New York
Chapman LJ (2001) Fishes of African rain forests: Diverse adaptations to environmental challenge. In: Weber W, White LJT, Vedder A, Naughton-Treves L (eds) African rain forest – ecology and conservation: An interdisciplinary perspective. Yale University Press, New Haven, pp 263–290
Colom A, Bakanza A, Mundeka J, Hamza T, Ntumbandzondo B (2006) The socio-economic dimensions of the management of biological resources, in the Lac Télé – Lac Tumba Landscape, DRC Segment: A segment-wide baseline Socio-Economic study’s Report. Submitted to the World Wide Fund for Nature DRC, Kinshasa Office, Democratic Republic of Congo
Daget J, Gosse JP, Thys van den Audenaerde DFE (1986) Checklist of the freshwater fishes of Africa. vols 1–3. ORSTOM, Paris, France
Darwell WRT, Smith KG (2011) Assessment methodology. In: Brooks EGE, Allen DJ, Darwell WRT (eds) The status and distribution of freshwater biodiversity in Central Africa. IUCN Gland (Switzerland) and Cambridge (UK), pp 21–26
De Robertis A, Ryer CH, Veloza A, Brodeur RD (2003) Differential effects of turbidity on prey consumption of piscivorous and planktivorous fish. Can J Fish Aquat Sci 60:1517–1526
De Wasseige C, Devers D, de Marcken P, Eba’a Atyi R, Nasi R, Mayaux P (eds) (2008) The Forests of the Congo Basin - State of the Forest 2008. Publications Office of the European Union, Luxembourg
FAO (2008) Database on introduction of aquatic species. Avalaible at http://www.fao.org/fishery/dias/1. 14 Dec 2012
Griffiths JF (1972) Climates of Africa. Elsevier Publishing Company, Amsterdam
Groombridge B, Jenkins MD (2000) Global biodiversity: Earth's living resources in the 21st century. The World Conservation Monitoring Centre, Cambridge (UK) and IUCN Gland (Switzerland)
Harms R (1989) Fishing and systems of production: the precolonial Nunu of the middle Zaïre. Cahier des Sciences Humaines 25:147–158
Hughes RH, Hughes JS (1992) Directory of African wetlands. The International Union for the Conservation of Nature, United Nations Environment Program & the World Conservation Monitoring Center
Inogwabini BI (2005) Common fishes of the Salonga National Park, Democratic Republic of Congo: preliminary survey and conservation issues. Oryx 39:78–81
Inogwabini BI, Sandokan MB, Ndunda M (2006) A dramatic decline in rainfall regime in the Congo Basin: evidence from a thirty-four year data set from the Mabali Scientific Research Centre, Democratic Republic of Congo. Int J Meteorol 31:278–285
Lévêque C, Paugy D (2006) Les poisons des eaux continentales Africaines: Diversité, écologie, utilisation par l’homme. Institut de Recherche pour le Développement, Paris
Marlier G (1973) Limnology of the Congo and Amazon Rivers. In: Meggers BJ, Ayensu ES, Duckworth WD (eds) Forest ecosystems in Africa and South America: A comparative review. Smithsonian Institution Press, Washington DC, pp 223–238
Miracle MP (1973) The Congo Basin as a habitat for man. In: Meggers BJ, Ayensu ES, Duckworth WD (eds) Forest ecosystems in Africa and South America: A comparative review. Smithsonian Institution Press, Washington DC, pp 255–344
Norris SM (2007) Malapteruridea.In: Stiassny MLJ, Teugels GG, Hopkins CD (ed) The fresh and brackish water fishes of the Lower Guinea, West-Central Africa, vol 1. Institut de Recherche pour le Développement (France), Muséum National d’Histoire Naturelle (France) & Musée Royal de l’Afrique Centrale (Belgique), pp 693
Norris K, Asase A, Collen B, Gockowksi J, Mason J, Phalan B, Wade A (2010) Biodiversity in a forest-agriculture mosaic – The changing face of West African rainforests. Biol Conserv 143:2341–2350
Paugey D, Schaffer SA (2007) Alestidea. In: Stiassny MLJ, Teugels GG, Hopkins CD (eds) The fresh and brackish water fishes of the Lower Guinea, West-Central Africa, vol 1. Institut de Recherche pour le Développement (France), Muséum National d’Histoire Naturelle (France) & Musée Royal de l’Afrique Centrale (Belgique), pp 347
PFBC (Partenariat pour les Forêts de Bassin du Congo) (2006) Les forets du bassin du Congo - Etat des forets 2006. Commission des Forêts d’Afrique Centrale (COMIFAC), Ministères des Affaires Etrangères du Gouvernement Français, Union Européenne, Agence Américaine pour le Développement International
Poll M (1961) Révision systématique et raciation géographique des Protopteridae de l'Afrique centrale. Annales du Musée royal de l'Afrique centrale 103:1–50
Poutier R (2003) L’Afrique Centrale et les régions transfrontalières: perspectives de reconstruction et d’intégration. Etude réalisée pour le compte de l’Initiative pour l’Afrique Centrale. Organisation de Coopération et de Développement Economique, Paris
Reinartz G, Inogwabini BI, Mafuta N, Lisalama WW (2006) Effects of forest type and human presence on bonobo (Pan paniscus) density in the Salonga National Park. Int J Primatol 27:603–634
Roberts TR (1973) Ecology of fishes in the Amazon and Congo basins. In: Meggers BJ, Ayensu ES, Duckworth WD (eds) Forest ecosystems in Africa and South America: A comparative review. Smithsonian Institution Press, Washington DC, pp 239–254
Rowe DK, Dean T (1998) Effects of turbidity on the feeding ability of the juvenile migrant stage of six New Zealand freshwater fish species. N Z J Mar Freshw Res 32:21–29
Rowe DK, Suren AM, Martin M, Smith JP, Smith B, Williams E (2002) Lethal turbidity levels for common freshwater fish and invertebrates in Auckland streams. Auckland Regional Council Technical Publication Number 337
Schlosser IJ (1982a) Fish community structure and function along two habitat gradients in a headwater stream. Ecol Monogr 52:395–414
Schlosser IJ (1982b) Trophic structure, reproductive success and growth rates of fishes in natural and modified headwater streams. Can J Fish Aquat Sci 39:968–978
Shaw EA, Richardson JS (2001) Direct and indirect effects of sediment pulse duration on stream invertebrate assemblages and rainbow trout (Oncorhynchus mykiss) growth and survival. Can J Fish Aquat Sci 58:2213–2221
Sheldon AL (1968) Species diversity and longitudinal successions in stream fishes. Ecology 49:193–198
Shumway C, Mosibono D, Ifuta S, Sullivan J, Schelly R, Punga J, Palata JC, Puema J (2002) Biodiversity Survey: Systematics, ecology, and conservation along the Congo River. Project Report, CREDP – USAID, Kinshasa, Democratic Republic of Congo
Smith KF, Brown JH (2002) Patterns of diversity, depth range and body size among pelagic fishes along a gradient of depth. Glob Ecol Biogéogr 11:313–322
Stiassny MLJ, Mamonekene V (in press) Fish Diversity in the Lake Tumba Landscape. In Inogwabini BI (ed) Conservation in large scale landscapes: A case study from the Congo Basin. Cambridge University Press
Stiassny MLJ, Teugels GG, Hopkins CD (eds) (2007) The fresh and brackish water fishes of the Lower Guinea, West-Central Africa, vols 1 & 2. Institut de Recherche pour le Développement (France), Muséum National d’Histoire Naturelle (France) & Musée Royal de l’Afrique Centrale (Belgique)
Stiassny MLJ, Brummett RE, Harrison IJ, Monsembula R, Mamonekene V (2011) The status and distribution of freshwater fishes in central Africa. In: Brooks EGE, Allen DJ, Darwell WRT (eds) The status and distribution of freshwater biodiversity in Central Africa. IUCN Gland (Switzerland) and Cambridge (UK), pp 27–46
Strayer DL, Dudgeon D (2010) Freshwater biodiversity conservation: recent progress and future challenges. J N Am Bentholl Soc 29:344–358
Suren AM, Jowett IG (2001) Effects of deposited sediment on invertebrate drift: an experimental study. N Z J Mar Freshw Res 35:725–737
Teugels GG (2007) Channidea. In: Stiassny MLJ, Teugels GG, Hopkins CD (eds) The fresh and brackish water fishes of the Lower Guinea, West-Central Africa, vol 2. Institut de Recherche pour le Développement (France), Muséum National d’Histoire Naturelle (/France) & Musée Royal de l’Afrique Centrale (Belgique), pp 241
Twagirashyaka F, Inogwabini BI (2009) The Forests of the Congo Basin - State of the Forest 2008. In: de Wasseige C, Devers D, de Marcken P, Eba’a Atyi R, Nasi R, Mayaux P (eds) The Forests of the Congo Basin - State of the Forest 2008. Publications Office of the European Union, Luxembourg, pp 305–316
WC (The World Fish Center) (2008) Tropical river fisheries valuation: Establishing economic value to guide policy. Issues Brief 1890
White LJT, Edwards A (eds) (2000) Conservation research in the African rain forests: A technical handbook. Wildlife Conservation Society, New York
Wood PJ, Armitage PD (1997) Biological effects of fine sediment in the lotic environment. Environ Manag 21:203–217
Acknowledgements
Data were collected through the USAID/CARPE Funding to the World Wide Fund for Nature. However, views expressed in this paper do not reflect those of the US Government. We thank the DRC Government for authorizing us to work in the Lac Tumba Landscape. The writing up of this paper was part of the Post Doctoral Research on identifying human influence in waters of the Lake Tumba landscape, Swedish University of Agricultural Sciences, Uppsala granted to Bila-Isia Inogwabini. Comments received from eight anonymous reviewers helped improve the quality of the paper. Our research was conducted with the approval of the Ministry of Environment and Nature Conservation of the Democratic Republic of Congo.
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Inogwabini, BI., Lingopa, Z. Fish species occurrence, estimates and human activities on the islands of the Congo River, Central Africa. Environ Biol Fish 96, 1289–1299 (2013). https://doi.org/10.1007/s10641-013-0136-4
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DOI: https://doi.org/10.1007/s10641-013-0136-4