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Retrodicting large herbivore biomass for the last glacial maximum on the Palaeo-Agulhas Plain (South Africa) using modern ecological knowledge of African herbivore assemblages and rainfall
Quaternary Research ( IF 1.7 ) Pub Date : 2021-05-14 , DOI: 10.1017/qua.2021.23
Christopher F. Brooke , Curtis W. Marean , Colin D. Wren , Hervé Fritz , Jan A. Venter

Herbivore distribution throughout Africa is strongly linked to mean annual precipitation. We use that relationship to predict functional group composition of herbivore communities during the last glacial maximum (ca. 21 ka) on the now submerged Palaeo-Agulhas Plain (PAP), South Africa. We used metabolic large herbivore biomass (MLHB) from 39 South African protected areas, in five functional groups (characterized by behavior and physiology). We examined how modern factors influenced MLHB and considered the effects of biome, annual rainfall, percentage winter rainfall, and protected area size. Overall, biome was the most important factor influencing the relationship between MLHB and rainfall. In general, MLHB increased with rainfall, but not for the grassland biome. Outside grasslands, most functional groups’ metabolic biomass increased with increasing rainfall, irrespective of biome, except for medium-sized social mixed feeder species in savanna and thicket. Protected area size was influential for medium-sized social mixed feeders and large browsers and rainfall influenced medium-sized social mixed feeders, offering some perspectives on spatial constraints on past large herbivore biomass densities. These results improve our understanding of the likely herbivore community composition and relative biomass structure on the PAP, an essential driver of how early humans utilized large mammals as a food resource.

中文翻译:

利用非洲食草动物群落和降雨的现代生态学知识,追溯古厄加勒斯平原(南非)最后一次冰期最大值的大型食草动物生物量

整个非洲的食草动物分布与年平均降水量密切相关。我们使用这种关系来预测南非现在被淹没的古厄加勒斯平原 (PAP) 的最后一次冰期最大值 (ca. 21 ka) 期间食草动物群落的功能群组成。我们使用来自 39 个南非保护区的代谢大型食草动物生物量 (MLHB),分为五个功能组(以行为和生理学为特征)。我们研究了现代因素如何影响 MLHB,并考虑了生物群落、年降雨量、冬季降雨百分比和保护区大小的影响。总体而言,生物群落是影响 MLHB 与降雨之间关系的最重要因素。一般而言,MLHB 随降雨而增加,但草原生物群系不增加。草原之外,大多数功能群的代谢生物量随着降雨量的增加而增加,与生物群落无关,除了稀树草原和灌丛中的中型社会混合饲养物种。保护区大小对中型社会混合饲养者和大型浏览器有影响,降雨影响中型社会混合饲养者,为过去大型食草动物生物量密度的空间限制提供了一些视角。这些结果提高了我们对 PAP 上可能的食草动物群落组成和相对生物量结构的理解,这是早期人类如何利用大型哺乳动物作为食物资源的重要驱动力。保护区大小对中型社会混合饲养者和大型浏览器有影响,降雨影响中型社会混合饲养者,为过去大型食草动物生物量密度的空间限制提供了一些视角。这些结果提高了我们对 PAP 上可能的食草动物群落组成和相对生物量结构的理解,这是早期人类如何利用大型哺乳动物作为食物资源的重要驱动力。保护区大小对中型社会混合饲养者和大型浏览器有影响,降雨影响中型社会混合饲养者,为过去大型食草动物生物量密度的空间限制提供了一些视角。这些结果提高了我们对 PAP 上可能的食草动物群落组成和相对生物量结构的理解,这是早期人类如何利用大型哺乳动物作为食物资源的重要驱动力。
更新日期:2021-05-14
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