Biophysical Heterogeneity, Hydrologic Connectivity, and Productivity of a Montane Floodplain Forest
Biophysical Heterogeneity, Hydrologic Connectivity, and Productivity of a Montane Floodplain Forest
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山地洪泛区森林的生物物理异质性、水文连通性和生产力
DOI:
10.1007/s10021-022-00769-2
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发表时间:
2022
期刊:
影响因子:
3.7
通讯作者:
Valett, H. Maurice
中科院分区:
文献类型:
--
作者:
Peipoch, Marc;Davis, Pete B.;Valett, H. Maurice
Floodplains display exceptional variation in habitat type, connectivity, and vegetation structure that make them ideal landscapes in which to address biophysical controls on primary production. However, our ability to do so requires fine-scale assessment of biophysical complexity over large spatial gradients in habitat heterogeneity, species composition, and productivity. We used LiDAR data and hydrologic modeling to quantify surface elevation, hydrologic connectivity, and a vegetation structural diversity index (VSDI) in 551 patches across a floodplain forest of a montane river corridor. We also estimated terrestrial primary production via the normalized difference vegetation index (NDVI) in each floodplain patch. Our main goal was to compare abiotic and biotic controls on terrestrial primary production using a path analysis model to estimate direct and indirect effects on NDVI values. Across the floodplain, patch inundation was predominantly low and negatively related to mean patch elevation (r= −0.434,p< 0.001) and distance to the river channel (r= −0.397,p< 0.001). Most patches exhibited high VSDI, corresponding to a total canopy cover of 25–65% and an average canopy height of 8.5 m. Path analysis revealed direct effects of inundation on canopy cover and NDVI, indicating abiotic control on both floodplain vegetation distribution and productivity. Canopy cover mediated indirect effects of inundation on vegetation structural diversity, which was in turn a strong mediator of the effects of canopy cover on forest productivity. Our results suggest that coexisting layers of vegetation in a floodplain patch provide complementary functional traits that interact with flooding regime to collectively increase aboveground productivity.
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影响因子:
12.1
作者:
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通讯作者:
R. Records;E. Wohl;M. Arabi
影响因子:
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作者:
Bejarano,Maria D.;Sordo-Ward,Alvaro;Nilsson,Christer
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DOI:
10.1080/03680770.2005.11901979
发表时间:
2005
期刊:
Internationale Vereinigung für theoretische und angewandte Limnologie: Verhandlungen
影响因子:
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--
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2000
期刊:
影响因子:
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J. Ward
DOI:
--
发表时间:
2013
期刊:
影响因子:
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作者:
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