| 来源类型 | Article |
| 规范类型 | 其他 |
| DOI | 10.1016/j.ecolmodel.2014.10.027 |
| Measuring sensitivity of robustness and network indices for an estuarine food web model under perturbations. | |
| Mukherjee J; Scharler UM; Fath BD; Ray S | |
| 发表日期 | 2015 |
| 出处 | Ecological Modelling 306: 160-173 |
| 出版年 | 2015 |
| 语种 | 英语 |
| 摘要 | Robustness is a universal feature of ecological systems which promotes sustainability over time. Robustness of an aquatic ecosystem, specifically an estuarine system, is investigated here using indicators derived from ecological network analysis. Estuaries provide us with many ecosystem services and these are consequently prone to face anthropogenic stresses. In South Africa, temporarily open/closed estuaries occupy a significant percentage of coastal boundaries. One of the South African estuaries, namely Mdloti, is studied here using network-based, Ecopath software. The estuarine energy flow networks are perturbed following different scenarios, which are assumed to be a result of selected anthropogenic stresses (eutrophication, overfishing) to the system. Several network indices such as total system throughput (TST), redundancy (R), Finn's Cycling Index (FCI) and ascendency over development capacity ratio (A/C) are calculated and analyzed for the original field-based network and three perturbed networks under different scenarios (change of autotrophic biomass, fish yield, and detritus import). Ecosystem robustness is high in the original (unperturbed) network and after perturbations the change in robustness is not significant for change in the autotrophic biomass scenario but is significant for the other two scenarios. These indicators reliably reflected the relative change of flow pattern if any changes occur and magnitude in the networks in different scenarios. From the present study, we show that certain common network indices as mentioned above provide a measure of robustness and can be used for the assessment of ecosystem organization and function. ENA properties and also robustness change depending on the type and magnitude of stress imposed on the system. |
| 主题 | Advanced Systems Analysis (ASA) |
| 关键词 | Network analysis Ascendency Development capacity Redundancy Perturbation Mdloti estuary |
| URL | http://pure.iiasa.ac.at/id/eprint/11457/ |
| 来源智库 | International Institute for Applied Systems Analysis (Austria) |
| 引用统计 | |
| 资源类型 | 智库出版物 |
| 条目标识符 | http://119.78.100.153/handle/2XGU8XDN/130364 |
| 推荐引用方式 GB/T 7714 | Mukherjee J,Scharler UM,Fath BD,et al. Measuring sensitivity of robustness and network indices for an estuarine food web model under perturbations.. 2015. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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