How large is large enough for insects? Forest fragmentation effects at three spatial scales Export

@article{citeulike:371057, abstract = {Several mechanisms may lead to species loss in fragmented habitats, such as edge and shape effects, loss of habitat and heterogeneity. Ants and crickets were sampled in 18 forest remnants in south-eastern Brazil, to test whether a group of small remnants maintains the same insect species richness as similar sized large remnants, at three spatial scales. We tested hypotheses about alpha and gamma diversity to explain the results. Groups of remnants conserve as many species of ants as a single one. Crickets, however, showed a scale-dependent pattern: at small scales there was no significant or important difference between groups of remnants and a single one, while at the larger scale the group of remnants maintained more species. Alpha diversity (local species richness) was similar in a group of remnants and in a single one, at the three spatial scales, both for ants and crickets. Gamma diversity, however, varied both with taxa (ants and crickets) and spatial scale, which may be linked to insect mobility, remnant isolation, and habitat heterogeneity. Biological characteristics of the organisms involved have to be considered when studying fragmentation effects, as well as spatial scale at which it operates. Mobility of the organisms influences fragmentation effects, and consequently conservation strategies.}, author = {Ribas, C. R. and Sobrinho, T. G. and Schoereder, J. H. and Sperber, C. F. and Lopes-Andrade, C. and Soares, S. M.}, citeulike-article-id = {371057}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.actao.2004.08.008}, citeulike-linkout-1 = {http://www.sciencedirect.com/science/article/B6VR3-4DKVNP0-1/2/d319ebe6aa718417add2ac3f13ff210d}, doi = {10.1016/j.actao.2004.08.008}, journal = {Acta Oecologica}, keywords = {ants, brazil, crickets, insects, inverts, south\_america, to\_check, tropical\_forest}, month = {}, number = {1}, pages = {31--41}, posted-at = {2005-10-30 15:39:00}, priority = {2}, title = {How large is large enough for insects? Forest fragmentation effects at three spatial scales}, url = {http://dx.doi.org/10.1016/j.actao.2004.08.008}, volume = {27}, year = {2005} }

TY - JOUR ID - citeulike:371057 L3 - citeulike-article-id:371057 N2 - Several mechanisms may lead to species loss in fragmented habitats, such as edge and shape effects, loss of habitat and heterogeneity. Ants and crickets were sampled in 18 forest remnants in south-eastern Brazil, to test whether a group of small remnants maintains the same insect species richness as similar sized large remnants, at three spatial scales. We tested hypotheses about alpha and gamma diversity to explain the results. Groups of remnants conserve as many species of ants as a single one. Crickets, however, showed a scale-dependent pattern: at small scales there was no significant or important difference between groups of remnants and a single one, while at the larger scale the group of remnants maintained more species. Alpha diversity (local species richness) was similar in a group of remnants and in a single one, at the three spatial scales, both for ants and crickets. Gamma diversity, however, varied both with taxa (ants and crickets) and spatial scale, which may be linked to insect mobility, remnant isolation, and habitat heterogeneity. Biological characteristics of the organisms involved have to be considered when studying fragmentation effects, as well as spatial scale at which it operates. Mobility of the organisms influences fragmentation effects, and consequently conservation strategies. IS - 1 JF - Acta Oecologica EP - 41 TI - How large is large enough for insects? Forest fragmentation effects at three spatial scales VL - 27 SP - 31 KW - ants KW - brazil KW - crickets KW - insects KW - inverts KW - south_america KW - to_check KW - tropical_forest AU - Ribas, CR AU - Sobrinho, TG AU - Schoereder, JH AU - Sperber, CF AU - Lopes-Andrade, C AU - Soares, SM PY - 2005/0// UR - http://dx.doi.org/10.1016/j.actao.2004.08.008 ER -