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Within-species relationship of patchiness to both abundance and occupancy, as exemplified by seagrass macrobenthos
Oecologia ( IF 2.7 ) Pub Date : 2021-07-09 , DOI: 10.1007/s00442-021-04985-w
R S K Barnes 1, 2, 3
Affiliation  

For the first time, intraspecific relationships between the macroecological metrics patchiness (P) and both abundance (A) and occupancy (O) were investigated in a faunal assemblage. As a companion study to recent work on interspecific P, A and O patterns at the same localities, intraspecific patterns were documented within each of the more dominant invertebrates forming the seagrass macrobenthos of warm–temperate Knysna estuarine bay (South Africa) and of sub-tropical Moreton Bay (Australia). As displayed interspecifically, individual species showed strong A–O patterns (mean scaling coefficient − 0.76 and mean R2 > 0.8). All P–O relations were negative and most (67%) were statistically significant, although weaker (mean R2 0.5) than A–O ones; most P–A ones were also negative but fewer (43%) achieved significance, and were even weaker (mean R2 0.4); 33% of species showed no significant interrelations of either O or A with P. No species showed only a significant P–A relationship. Compared with interspecific P–A–O data from the same assemblages, power–law scaling exponents were equivalent, but R2 values were larger. Larviparous species comprised 70% of the total studied, but 94% of those displaying significant patchiness interrelationships; 5 of the 9 showing no P–A or P–O relationships, however, were also larviparous. At Knysna, though not in Moreton Bay, larviparous species also showed higher levels of occupancy than non-larviparous ones, whilst non-larviparous species showed higher levels of patchiness. Dominant Moreton Bay species, but not those at Knysna, exhibited homogeneously sloped P–O relationships.



中文翻译:

斑块状与丰度和占有率的种内关系,以海草大型底栖动物为例

首次在动物群中研究了宏观生态指标斑块性(P)与丰度(A)和占有率(O)之间的种内关系。作为最近在同一地点对种间 P、A 和 O 模式进行研究的配套研究,在形成暖温带克尼斯纳河口湾(南非)和亚亚热带海草大型底栖动物的每个更占优势的无脊椎动物中都记录了种内模式。热带摩顿湾(澳大利亚)。如具体显示,个别物种显示出强烈的 A-O 模式(平均比例系数 - 0.76 和平均R 2  > 0.8)。所有 P-O 关系均为负数,大多数(67%)具有统计学意义,尽管较弱(平均R 20.5) 比 A-O 的;大多数 P-A 也是负数,但较少(43%)达到显着性,甚至更弱(平均R 2 0.4);33% 的物种显示 O 或 A 与 P 没有显着的相互关系。没有物种仅显示出显着的 P-A 关系。与来自相同组合的种间 P-A-O 数据相比,幂律缩放指数是等效的,但 R 2值更大。幼虫类占研究总数的 70%,但其中 94% 表现出显着的斑块状相互关系;然而,在没有 P-A 或 P-O 关系的 9 个中,有 5 个也是幼虫的。在克尼斯纳,虽然不是在摩顿湾,但幼虫物种的入住率也高于非幼虫物种,而非幼虫物种则表现出更高的斑块度。主要的摩顿湾物种,但不是克尼斯纳的那些,表现出均匀倾斜的 P-O 关系。

更新日期:2021-07-09
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