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The unexpected influence of legacy conspecific density dependence
Ecology Letters ( IF 7.6 ) Pub Date : 2024-06-10 , DOI: 10.1111/ele.14449 Lukas J Magee 1 , Joseph A LaManna 2 , Amy T Wolf 3 , Robert W Howe 3 , Yuanming Lu 4 , Denis Valle 1 , Daniel J B Smith 5 , Robert Bagchi 6 , David Bauman 7 , Daniel J Johnson 1
Ecology Letters ( IF 7.6 ) Pub Date : 2024-06-10 , DOI: 10.1111/ele.14449 Lukas J Magee 1 , Joseph A LaManna 2 , Amy T Wolf 3 , Robert W Howe 3 , Yuanming Lu 4 , Denis Valle 1 , Daniel J B Smith 5 , Robert Bagchi 6 , David Bauman 7 , Daniel J Johnson 1
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When plants die, neighbours escape competition. Living conspecifics could disproportionately benefit because they are freed from negative intraspecific processes; however, if the negative effects of past conspecific neighbours persist, other species might be advantaged, and diversity might be maintained through legacy effects. We examined legacy effects in a mapped forest by modelling the survival of 37,212 trees of 23 species using four neighbourhood properties: living conspecific, living heterospecific, legacy conspecific (dead conspecifics) and legacy heterospecific densities. Legacy conspecific effects proved nearly four times stronger than living conspecific effects; changes in annual survival associated with legacy conspecific density were 1.5% greater than living conspecific effects. Over 90% of species were negatively impacted by legacy conspecific density, compared to 47% by living conspecific density. Our results emphasize that legacies of trees alter community dynamics, revealing that prior research may have underestimated the strength of density dependent interactions by not considering legacy effects.
中文翻译：
遗留同种密度依赖性的意外影响
当植物死亡时，邻居就会逃避竞争。活着的同种动物可能会受益匪浅，因为他们摆脱了负面的种内过程；然而，如果过去同种邻居的负面影响持续存在，其他物种可能会受益，并且多样性可能会通过遗留效应得以维持。我们通过使用四种邻域属性对 23 个物种的 37,212 棵树的生存进行建模，检查了映射森林中的遗留影响：活同种、活异种、遗留同种（死亡同种）和遗留异种密度。事实证明，遗留的同种效应比现存的同种效应强近四倍；与遗留同种密度相关的年生存率变化比现存同种效应高 1.5%。超过 90% 的物种受到遗留同种密度的负面影响，而 47% 的物种受到现存同种密度的负面影响。我们的结果强调，树木的遗产改变了群落动态，表明先前的研究可能由于不考虑遗产效应而低估了密度依赖相互作用的强度。
更新日期：2024-06-11
中文翻译：
遗留同种密度依赖性的意外影响
当植物死亡时，邻居就会逃避竞争。活着的同种动物可能会受益匪浅，因为他们摆脱了负面的种内过程；然而，如果过去同种邻居的负面影响持续存在，其他物种可能会受益，并且多样性可能会通过遗留效应得以维持。我们通过使用四种邻域属性对 23 个物种的 37,212 棵树的生存进行建模，检查了映射森林中的遗留影响：活同种、活异种、遗留同种（死亡同种）和遗留异种密度。事实证明，遗留的同种效应比现存的同种效应强近四倍；与遗留同种密度相关的年生存率变化比现存同种效应高 1.5%。超过 90% 的物种受到遗留同种密度的负面影响，而 47% 的物种受到现存同种密度的负面影响。我们的结果强调，树木的遗产改变了群落动态，表明先前的研究可能由于不考虑遗产效应而低估了密度依赖相互作用的强度。
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