Model of pattern formation in marsh ecosystems with nonlocal interactions
Model of pattern formation in marsh ecosystems with nonlocal interactions
复制标题
具有非局部相互作用的沼泽生态系统模式形成模型
DOI:
10.1007/s00285-019-01437-1
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发表时间:
2020
影响因子:
1.9
通讯作者:
Shaw, Leah B.
中科院分区:
文献类型:
--
作者:
Zaytseva, Sofya;Shi, Junping;Shaw, Leah B.
Smooth cordgrassSpartina alterniflorais a grass species commonly found in tidal marshes. It is an ecosystem engineer, capable of modifying the structure of its surrounding environment through various feedbacks. The scale-dependent feedback between marsh grass and sediment volume is particularly of interest. Locally, the marsh vegetation attenuates hydrodynamic energy, enhancing sediment accretion and promoting further vegetation growth. In turn, the diverted water flow promotes the formation of erosion troughs over longer distances. This scale-dependent feedback may explain the characteristic spatially varying marsh shoreline, commonly observed in nature. We propose a mathematical framework to model grass–sediment dynamics as a system of reaction–diffusion equations with an additional nonlocal term quantifying the short-range positive and long-range negative grass–sediment interactions. We use a Mexican-hat kernel function to model this scale-dependent feedback. We perform a steady state biharmonic approximation of our system and derive conditions for the emergence of spatial patterns, corresponding to a spatially varying marsh shoreline. We find that the emergence of such patterns depends on the spatial scale and strength of the scale-dependent feedback, specified by the width and amplitude of the Mexican-hat kernel function.
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影响因子:
2.9
作者:
Altieri, Andrew H.;Silliman, Brian R.;Bertness, Mark D.
通讯作者:
Bertness, Mark D.
影响因子:
--
作者:
C. Watt;D. Garbary;Caroline M. Longtin
通讯作者:
Caroline M. Longtin
DOI:
--
发表时间:
2018
期刊:
影响因子:
--
作者:
R. Martínez;C. López
通讯作者:
C. López
影响因子:
56.9
作者:
Raspopovic, J.;Marcon, L.;Sharpe, J.
通讯作者:
Sharpe, J.
影响因子:
1.9
作者:
P. Bates;Xiaofeng Ren
通讯作者:
Xiaofeng Ren