Density-body mass relationships: Inconsistent intercontinental patterns among termite feeding-groups
Density-body mass relationships: Inconsistent intercontinental patterns among termite feeding-groups
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DOI：
10.1016/j.actao.2015.01.003
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发表时间：
2015-02-01
影响因子：
1.8
通讯作者：
Eggleton, Paul
中科院分区：
文献类型：
--
作者：
Dahlsjoe, Cecilia A. L.;Parr, Catherine L.;Eggleton, Paul
异速生长关系对于估计和理解不同质量物种组合中的资源分布是有用的。达穆特定律指出，体重与人口密度成比例，M-0.75，M-，其中M是体重，-0.75是斜率。在这项研究中，我们使用Damuth的法律（M-0.75）作为一个零假设，以检查白蚁饲养组在三个不同的国家和地区（喀麦隆，西非;秘鲁南美洲和马来西亚东南亚）的体重和人口密度之间的关系。我们发现，没有一个喂养组有一个关系，其中M-0.75，而数据表明，人口密度-体重的关系，真正的土壤喂养白蚁在喀麦隆（M-2.7）和木材喂养白蚁在秘鲁（M-1.5）是显着不同的预期值由Damuth的法律。在喀麦隆和真菌生长的白蚁从秘鲁的情况下，大型的真正的土壤喂养白蚁的优势表明，这些异速生长模式是由于在白蚁地理进化的异质性。此外，由于这些摄食群体的种群密度高于其体重预期，因此可能表明它们的能量吞吐量也高于预期。这里提出的结果可以用来进一步了解资源分布之间的白蚁取食群体的跨区域和洞察的重要性，进化历史和异速生长模式。进一步了解白蚁取食群的种群密度-体重关系，也可以提高对这些取食群在不同地区生态系统过程中所起作用的理解。(C)2015年Elsevier Masson SAS。All rights reserved.
Allometric relationships are useful for estimating and understanding resource distribution in assemblages with species of different masses. Damuth's law states that body mass scales with population density as M--0.75,M- where M is body mass and -0.75 is the slope. In this study we used Damuth's law (M-0.75) as a null hypothesis to examine the relationship between body mass and population density for termite feeding-groups in three different countries and regions (Cameroon, West Africa; Peru South America; and Malaysia SE Asia). We found that none of the feeding-groups had a relationship where M-0.75 while the data suggested that population density-body mass relationships for true soil-feeding termites in Cameroon (M-2.7) and wood-feeding termites in Peru (M-1.5) were significantly different from the expected values given by Damuth's law. The dominance of large-bodied true soil-feeding termites in Cameroon and the absence of fungus-growing termites from Peru suggest that these allometric patterns are due to heterogeneities in termite biogeographical evolution. Additionally, as these feeding-groups have higher population density than expected by their body masses it may be suggested that they also have a higher energy throughput than expected. The results presented here may be used to gain further understanding of resource distribution among termite feeding-groups across regions and an insight into the importance of evolutionary history and biogeography on allometric patterns. Further understanding of population density-body mass relationships in termite feeding-groups may also improve understanding of the role these feeding-groups play in ecosystem processes in different regions. (C) 2015 Elsevier Masson SAS. All rights reserved.