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Biodiversity 'surpluses' and 'deficits' are not novel issues

机译:生物多样性的“过剩”和“赤字”不是新问题

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摘要

Jackson and Sax (JS, [1]) provided a conceptual framework to analyze biodiversity dynamics after environmental change. They discuss transients caused by lags in extinction and immigration, rightly seen as of major importance for the future of biodiversity. Borrowing terms from accountancy, they discuss concepts such as ‘‘extinction debts’’, ‘‘immigration credits’’, ‘‘biodiversity surpluses’’ and ‘‘biodiversity deficits’’. For example, when time scales of immigration and extinction differ, temporary biodiversity surpluses or deficits may arise. Accidentally, JS overlooked my earlier work [2] covering much of the same ground. This work also corroborates, and adds to, the mainly conceptually oriented approach of JS by using an explicit evolution-based mechanistic model. Thereby it fulfills some of their expressed needs for further research and helps with the understanding and prediction of the kinds of transient dynamics JS discuss.
机译:Jackson and Sax(JS,[1])提供了一个概念框架来分析环境变化后的生物多样性动态。他们讨论了因物种灭绝和移民滞后而造成的短暂过渡,理应将其视为对生物多样性未来的重要意义。他们从会计中借用术语,讨论诸如“灭绝债务”,“移民信贷”,“生物多样性盈余”和“生物多样性赤字”之类的概念。例如,当移民和灭绝的时间尺度不同时,可能会出现暂时的生物多样性过剩或不足。偶然地,JS忽略了我先前的工作[2],这些工作涉及很多相同的方面。这项工作还通过使用显式的基于演化的机制模型,证实并添加了JS的主要面向概念的方法。因此,它满足了他们表示的进一步研究的一些需求,并有助于理解和预测JS讨论的瞬态动力学的种类。

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