元种群生态网络的稳定性感知空间分割

IF 3.1 3区 环境科学与生态学 Q2 ECOLOGY
Dinesh Kumar, Abhishek Ajayakumar, Soumyendu Raha
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引用次数: 2

摘要

生态复杂网络在补丁生态系统的研究中很常见,其中进化的种群在补丁内部和补丁之间相互作用。由于迁移通道的侵蚀和道路建设等原因,斑块之间分散联系的丧失可能导致这种网络的不理想划分,从而导致不稳定或对元种群产生负面影响。考虑到子网络动态稳定性的分区或空间切割可以成为处理诸如通过元人口网络规划道路路线等情况的有效工具。本文给出了一些数学条件以及启发式图划分算法,可以帮助找到生态上合适的元种群网络分区。我们的研究注意到网络连通性(由费德勒值测量)在稳定元种群中的关键作用。也就是说,一个充分连通的元种群网络,在约束的内部斑块动态下,其齐次共存平衡解周围具有稳定的动态。在本文所考虑的数学模型中,网络分区不会改变其均匀均衡点周围的内部补丁动态,但会改变被分区子网中的连通性水平。因此,对于已经稳定的元种群网络,所提出的分区问题被简化为寻找具有理想连接级别的子网络。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Stability aware spatial cut of metapopulations ecological networks

Ecological complex networks are common in the study of patched ecological systems where evolving populations interact within and among the patches. The loss of the dispersal connections between patches due to reasons such as erosion of migration corridors and road construction can cause an undesirable partitioning of such networks resulting in instability or negative impact on the metapopulations. A partitioning or spatial cut that is aware of the stability of the dynamics in the resulting daughter sub-networks can be an effective tool in dealing with the situation like proposing road alignment through a metapopulations network. This paper provides some mathematical conditions along with an heuristic graph partitioning algorithm that can help in finding ecologically suitable partitions of the metapopulations networks. Our study noted the crucial role of network connectivity (measured by Fiedler value) in stabilizing the metapopulations. That is, a sufficiently connected metapopulations network along with constrained internal patch dynamics has stable dynamics around its homogeneous co-existential equilibrium solution. With the considered mathematical model in this paper, network partitioning does not alter the internal patch dynamics around its homogeneous equilibrium point, but it can change the connectivity levels in the partitioned subnetworks. Thus, the proposed partitioning problem for an already stable metapopulations network is reduced to finding its subnetworks with desirable connectivity levels.

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来源期刊
Ecological Complexity
Ecological Complexity 环境科学-生态学
CiteScore
7.10
自引率
0.00%
发文量
24
审稿时长
3 months
期刊介绍: Ecological Complexity is an international journal devoted to the publication of high quality, peer-reviewed articles on all aspects of biocomplexity in the environment, theoretical ecology, and special issues on topics of current interest. The scope of the journal is wide and interdisciplinary with an integrated and quantitative approach. The journal particularly encourages submission of papers that integrate natural and social processes at appropriately broad spatio-temporal scales. Ecological Complexity will publish research into the following areas: • All aspects of biocomplexity in the environment and theoretical ecology • Ecosystems and biospheres as complex adaptive systems • Self-organization of spatially extended ecosystems • Emergent properties and structures of complex ecosystems • Ecological pattern formation in space and time • The role of biophysical constraints and evolutionary attractors on species assemblages • Ecological scaling (scale invariance, scale covariance and across scale dynamics), allometry, and hierarchy theory • Ecological topology and networks • Studies towards an ecology of complex systems • Complex systems approaches for the study of dynamic human-environment interactions • Using knowledge of nonlinear phenomena to better guide policy development for adaptation strategies and mitigation to environmental change • New tools and methods for studying ecological complexity
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