Meta-analysis of elevational changes in the intensity of trophic interactions: Similarities and dissimilarities with latitudinal patterns,Ecology Letters

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Meta-analysis of elevational changes in the intensity of trophic interactions: Similarities and dissimilarities with latitudinal patterns
Ecology Letters ( IF 7.6 ) Pub Date : 2022-08-11 , DOI: 10.1111/ele.14090
Elena L Zvereva ₁ , Mikhail V Kozlov ₁

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The premise that the intensity of biotic interactions decreases with increasing latitudes and elevations is broadly accepted; however, whether these geographical patterns can be explained within a common theoretical framework remains unclear. Our goal was to identify the general pattern of elevational changes in trophic interactions and to explore the sources of variation among the outcomes of individual studies. Meta-analysis of 226 effect sizes calculated from 134 publications demonstrated a significant but interaction-specific decrease in the intensity of herbivory, carnivory and parasitism with increasing elevation. Nevertheless, this decrease was not significant at high latitudes and for interactions involving endothermic organisms, for herbivore outbreaks or for herbivores living within plant tissues. Herbivory similarly declined with increases in latitude and elevation, whereas carnivory showed a fivefold stronger decrease with elevation than with latitude and parasitism increased with latitude but decreased with elevation. Thus, although these gradients share a general pattern and several sources of variation in trophic interaction intensity, we discovered important dissimilarities, indicating that elevational and latitudinal changes in these interactions are partly driven by different factors. We conclude that the scope of the latitudinal biotic interaction hypothesis cannot be extended to incorporate elevational gradients.

中文翻译：

营养相互作用强度海拔变化的荟萃分析：与纬度模式的异同

生物相互作用的强度随着纬度和海拔的增加而降低的前提已被广泛接受；然而，这些地理模式是否可以在共同的理论框架内得到解释仍不清楚。我们的目标是确定营养相互作用中海拔变化的一般模式，并探索个别研究结果之间的变异来源。对 134 篇出版物计算出的 226 个效应大小进行的荟萃分析表明，随着海拔的增加，食草性、肉食性和寄生性的强度显着但具有交互作用特异性降低。然而，这种减少在高纬度地区以及涉及吸热生物、食草动物爆发或生活在植物组织内的食草动物的相互作用中并不显着。同样，草食性随着纬度和海拔的增加而减少，而肉食性随着海拔的增加而减少的程度是纬度增加的五倍，而寄生性则随着纬度的增加而增加，但随着海拔的增加而减少。因此，尽管这些梯度具有一般模式和营养相互作用强度变化的几个来源，但我们发现了重要的差异，表明这些相互作用的海拔和纬度变化部分是由不同因素驱动的。我们的结论是，纬度生物相互作用假说的范围不能扩展到纳入海拔梯度。

更新日期：2022-08-11

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