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Taxonomic and community composition of epigeal arthropods in monoculture and mixed tree species plantations in a deciduous forest of Ghana

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Journal of Forestry Research 2023年第3期34卷 641-653页

作者： Frederick Gyasi Damptey Emmanuel Opuni-Frimpong Collins Ayine Nsor James Addai Daniel Kwame Debrah Benjamin Schnerch Felicity Bentsi-Enchill henn korjus Department of Ecology Brandenburg University of Technology Cottbus-Senftenberg03046 CottbusGermany CSIR-Forestry Research Institute of Ghana KumasiGhana School of Natural Resources University of Energy and Natural Resources(UENR)SunyaniGhana Department of Forest Resources Technology Kwame Nkrumah University of Science and TechnologyKumasiGhana Forest Service Division of the Forestry Commission Accra Department of Biology Education Faculty of Science EducationUniversity of EducationWinnebaGhana Institute of Forestry and Rural Engineering Estonian University of Life SciencesTartuEstonia

Tropical forests provide several ecosystem services and functions and support approximately two-thirds of the world’s biodiversity but are seriously threatened by *** to counteract this menace have revolved around aff orestation with several or a single tree *** thus investigated how plantation forests with either a single or several tree species infl uenced arthropod taxonomic and community composition using pitfall traps to sample selected groups of epigeal arthropods(Araneae,Coleoptera,Orthoptera and Hymenoptera)and with environmental variables assessed *** results revealed 54 taxonomic groups with signifi cantly higher taxonomic richness,activity density,and diversity in the mixed stands than in the monoculture *** significant differences in community composition were mainly driven by families including Lycosidae,Formicidae,Staphylinidae,Scotylidae,Hydrophilidae,Gryllidae and Scarabaeidae and were explained by distinct habitat characteristics(canopy openness,litter depth,deadwood volume,and tree height).While the diverse tree communities and heterogeneous vegetation structure off ered food and habitat resources for diverse arthropod groups,the allelopathic nature coupled with homogenous stand characteristics of the Tectona grandis stands in the monoculture suppressed the growth of understorey vegetation that could otherwise serve as food and habitat resources for arthropods,which might have led to limited activities and diversity of arthropods in the monoculture plantation *** fi ndings thus highlight the need to promote mixed tree plantations in degraded tropical areas,especially when restoring biodiversity is the prime management focus.

关键词： Arthropod community Forest plantations Structural complexity Tree diversity Tropical deforestation

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Analysis of the Estonian Forest Conservation Area Network

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Journal of Environmental Science and Engineering(B) 2012年第6期1卷 779-788页

作者： henn korjus Diana Laarmann Andres Kiviste Institute of Forestry and Rural Engineering Estonian University of Life Sciences Tartu 51014 Estonia

Estonian Forestry Development Programme set in 2003 ambitious goal that area of strictly protected forests should increase at least to 10% from total forest area in Estonia before 2010 by expanding the area of old-growth under protection, improving the representativeness of conservation areas and establishment of large conservation sites. Inventory of forests was carried out on existing and possible new conservation areas within the Estonian Forest Conservation Area Network project （EFCAN） in 1999-2001. EFCAN project had remarkable results. The share of strictly protected forests has increased to 7.8% of total forest area by 2009 and the network of conservation areas is quite well covering all forest ecosystems in Estonia. Several selected areas are still not protected for different reasons. These areas should still be considered for protection as the areas may lose their conservation value. Several forest types （meso-eutrophic, eutrophic boreo-nemoral and eutrophic paludifying forests） should have larger area for conservation and large disturbance areas （wind damage, forest fire） should be also included into the network.

关键词： Forest conservation biological diversity ecological network

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