Coral-algal phase shifts alter fish communities and reduce fisheries production.

Coral-algal phase shifts alter fish communities and reduce fisheries production.
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珊瑚 - 阿尔加尔相变会改变鱼类群落并减少渔业的生产。

DOI:
10.1111/gcb.12667
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发表时间:
2015-01
影响因子:
11.6
通讯作者:
Mumby PJ
Mumby PJ
中科院分区:
环境科学与生态学1区
文献类型:
--
作者:
Ainsworth CH;Mumby PJ

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人为压力已被证明会减少世界各地生态系统的珊瑚覆盖面。珊瑚礁的丧失可能伴随着向藻类占主导地位的系统的阶段性转变。在这种情况下,与珊瑚礁有关的鱼类组合的组成将发生变化,依赖珊瑚礁渔业获得收入和粮食安全的人类社区可能受到不利影响。我们提出了一个案例研究的基础上,拉贾安帕群岛在印度尼西亚东部。使用动态食物网模型,我们模拟珊瑚礁的损失,伴随着过渡到藻类占主导地位的状态,并量化鱼类种群和渔业生产力的可能变化。一组模拟代表极端的情况,包括100%的珊瑚损失。在这个实验中,生态系统的变化是由珊瑚损失本身和一定程度的栖息地依赖珊瑚礁鱼类的假设。另一种模拟没有假设的栖息地依赖,生态系统的变化是由珊瑚礁鱼类群落的历史观测珊瑚丢失。珊瑚-藻类相移导致生物多样性和生态系统成熟度降低。小型鱼类物种生物量的相对增加意味着珊瑚礁的总体生产力提高,但传统目标物种的上岸量大大减少。
Anthropogenic stress has been shown to reduce coral coverage in ecosystems all over the world. A phase shift towards an algae-dominated system may accompany coral loss. In this case, the composition of the reef-associated fish assemblage will change and human communities relying on reef fisheries for income and food security may be negatively impacted. We present a case study based on the Raja Ampat Archipelago in Eastern Indonesia. Using a dynamic food web model, we simulate the loss of coral reefs with accompanied transition towards an algae-dominated state and quantify the likely change in fish populations and fisheries productivity. One set of simulations represents extreme scenarios, including 100% loss of coral. In this experiment, ecosystem changes are driven by coral loss itself and a degree of habitat dependency by reef fish is assumed. An alternative simulation is presented without assumed habitat dependency, where changes to the ecosystem are driven by historical observations of reef fish communities when coral is lost. The coral–algal phase shift results in reduced biodiversity and ecosystem maturity. Relative increases in the biomass of small-bodied fish species mean higher productivity on reefs overall, but much reduced landings of traditionally targeted species.
DOI: 10.1016/j.ecolmodel.2008.02.039
发表时间: 2008-06-24
影响因子: 3.1
作者:
Ainsworth, C. H.;Varkey, D. A.;Pitcher, T. J.
通讯作者: Pitcher, T. J.
草食性鱼类保护是否真的可以改善珊瑚礁的弹性?来自新喀里多尼亚(南太平洋)的案例研究。
DOI: 10.1371/journal.pone.0060564
发表时间: 2013
期刊: PloS one
影响因子: 3.7
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DOI: 10.3354/meps08724
发表时间: 2010-01-01
影响因子: 2.5
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DOI: 10.1007/bf01313160
发表时间: 1990-01-01
期刊: MARINE BIOLOGY
影响因子: 2.4
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DOI: 10.1016/s0025-326x(00)00200-9
发表时间: 2001-01-01
影响因子: 5.8
作者:
Edwards, AJ;Clark, S;Rubens, J
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