Changes of species diversity in a simulated fragmented neutral landscape Export

@article{citeulike:1616995, abstract = {To predict how ecological communities respond to large-scale patterns of fragmentation, both local and global processes need to be combined into an integrated modelling approach. Using neotropical rain forests as an illustration, we constructed a large metacommunity ([thin space]km) where all the trees >=10[thin space]cm dbh are modelled, assuming panmixis within local communities (each [thin space]km in size), and limited dispersal across communities. Under the assumption of neutrality, we simulated an equilibrium configuration, that we subsequently submitted to several scenarios of environmental fragmentation. Fragmentation leads to a significant reduction of species diversity in edge communities. After the disturbance, the system returns to equilibrium rapidly if the disturbance is not too widespread, due to dispersal from neighboring areas. However, post-disturbance levels of local diversity remain much lower that pre-disturbance ones, at least within ecological times. These results illustrate the claim that neutral landscape models exhibit a partly predictable ecological-time dynamics, mostly driven by the ability of the metacommunity to buffer accidents in local communities. Such a multi-scale model should be considered as a null scenario in testing more complex effects related to habitat fragmentation, such as genetic bottlenecks, or loss of keystone species.}, author = {Chave, Jerome and Norden, Natalia}, booktitle = {Uncertainty in Ecological Models}, citeulike-article-id = {1616995}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.ecolmodel.2007.03.025}, citeulike-linkout-1 = {http://www.sciencedirect.com/science/article/B6VBS-4NS36HS-2/2/6d9c152dbda8f4fbecdd3047ca28fcbd}, day = {16}, doi = {10.1016/j.ecolmodel.2007.03.025}, journal = {Ecological Modelling}, keywords = {habitat\_modelling, spatial\_distribution}, month = {September}, number = {1}, pages = {3--10}, posted-at = {2007-09-04 01:36:48}, priority = {2}, title = {Changes of species diversity in a simulated fragmented neutral landscape}, url = {http://dx.doi.org/10.1016/j.ecolmodel.2007.03.025}, volume = {207}, year = {2007} }

TY - JOUR ID - citeulike:1616995 L3 - citeulike-article-id:1616995 N2 - To predict how ecological communities respond to large-scale patterns of fragmentation, both local and global processes need to be combined into an integrated modelling approach. Using neotropical rain forests as an illustration, we constructed a large metacommunity ([thin space]km) where all the trees >=10[thin space]cm dbh are modelled, assuming panmixis within local communities (each [thin space]km in size), and limited dispersal across communities. Under the assumption of neutrality, we simulated an equilibrium configuration, that we subsequently submitted to several scenarios of environmental fragmentation. Fragmentation leads to a significant reduction of species diversity in edge communities. After the disturbance, the system returns to equilibrium rapidly if the disturbance is not too widespread, due to dispersal from neighboring areas. However, post-disturbance levels of local diversity remain much lower that pre-disturbance ones, at least within ecological times. These results illustrate the claim that neutral landscape models exhibit a partly predictable ecological-time dynamics, mostly driven by the ability of the metacommunity to buffer accidents in local communities. Such a multi-scale model should be considered as a null scenario in testing more complex effects related to habitat fragmentation, such as genetic bottlenecks, or loss of keystone species. IS - 1 JF - Ecological Modelling EP - 10 TI - Changes of species diversity in a simulated fragmented neutral landscape VL - 207 T2 - Uncertainty in Ecological Models SP - 3 KW - habitat_modelling KW - spatial_distribution AU - Chave, Jerome AU - Norden, Natalia PY - 2007/09/16/ UR - http://dx.doi.org/10.1016/j.ecolmodel.2007.03.025 ER -