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True blue: Temporal and spatial stability of pelagic wildlife at a submarine canyon
Ecosphere ( IF 2.7 ) Pub Date : 2021-03-24 , DOI: 10.1002/ecs2.3423 J. A. H. Forrest 1 , P. J. Bouchet 1, 2 , S. C. Barley 1 , A. G. McLennan 1 , J. J. Meeuwig 1
Ecosphere ( IF 2.7 ) Pub Date : 2021-03-24 , DOI: 10.1002/ecs2.3423 J. A. H. Forrest 1 , P. J. Bouchet 1, 2 , S. C. Barley 1 , A. G. McLennan 1 , J. J. Meeuwig 1
Affiliation
In coastal systems, marine‐protected areas (MPAs) have been shown to increase the diversity, abundance, and biomass of wildlife assemblages as well as their resilience to climate change. The effectiveness of pelagic MPAs is less clear, with arguments against their establishment typically based on the highly mobile nature of pelagic taxa. We used mid‐water stereo‐baited remote underwater video systems (stereo‐BRUVS) and spatial predictive models to characterize the pelagic wildlife assemblage at the head of the Perth Canyon, one of the largest submarine canyons in Australia, over a 7‐yr period (2013–2019). The total number of unique taxa and mean values of taxonomic richness, abundance, fork length, and biomass demonstrated strong interannual stability, although mean taxonomic richness and abundance were significantly lower in 2018 relative to other years. Seasonal variability was absent in 2016, but in 2018, taxonomic richness and abundance were three times greater in the Austral spring than in the autumn. Some mobile megafauna were only recorded at the Perth Canyon Marine Park (PCMP) in the autumn, suggesting a seasonal component to their occurrence. The fine‐scale distribution of pelagic taxa at the canyon head was largely stable over time, with many areas of higher relative probability of presence located outside protected zones. Despite a degree of variability that may relate to the effect of the El Niño Southern Oscillation on the Leeuwin Current, the PCMP assemblage demonstrates a relatively high degree of spatiotemporal stability. Stronger protection of the PCMP (IUCN II or higher) would potentially improve conservation outcomes for many species of pelagic wildlife.
中文翻译:
真蓝色:海底峡谷中上层野生动物的时空稳定性
在沿海系统中,海洋保护区(MPA)已显示出增加了野生生物组合的多样性,丰富度和生物量,以及它们对气候变化的适应力。中上层海洋保护区的有效性尚不清楚,人们通常基于中上层生物群的高度移动性来反对建立它们。我们使用水下诱饵的水下远程视频系统(stereo-BRUVS)和空间预测模型来描述珀斯峡谷(Peth Canyon)头(澳大利亚最大的海底峡谷之一)历时7年的中上层野生动植物群的特征。 (2013–2019)。唯一分类单元的总数以及分类丰富度,丰度,叉子长度和生物量的平均值显示出很强的年际稳定性,尽管与其他年份相比,2018年的平均分类学丰富度和丰度显着降低。2016年没有季节性变化,但在2018年,南方春季的分类学丰富度和丰富度是秋季的三倍。秋季仅在珀斯峡谷海洋公园(PCMP)上记录了一些大型动植物,这表明它们是季节性发生的。随着时间的推移,浮游类群的精细分布在很大程度上是稳定的,相对存在概率较高的许多地区都位于保护区之外。尽管在一定程度上可能与厄尔尼诺南方涛动对吕温洋流的影响有关,但PCMP组合显示出相对较高的时空稳定性。
更新日期:2021-03-25
中文翻译:
真蓝色:海底峡谷中上层野生动物的时空稳定性
在沿海系统中,海洋保护区(MPA)已显示出增加了野生生物组合的多样性,丰富度和生物量,以及它们对气候变化的适应力。中上层海洋保护区的有效性尚不清楚,人们通常基于中上层生物群的高度移动性来反对建立它们。我们使用水下诱饵的水下远程视频系统(stereo-BRUVS)和空间预测模型来描述珀斯峡谷(Peth Canyon)头(澳大利亚最大的海底峡谷之一)历时7年的中上层野生动植物群的特征。 (2013–2019)。唯一分类单元的总数以及分类丰富度,丰度,叉子长度和生物量的平均值显示出很强的年际稳定性,尽管与其他年份相比,2018年的平均分类学丰富度和丰度显着降低。2016年没有季节性变化,但在2018年,南方春季的分类学丰富度和丰富度是秋季的三倍。秋季仅在珀斯峡谷海洋公园(PCMP)上记录了一些大型动植物,这表明它们是季节性发生的。随着时间的推移,浮游类群的精细分布在很大程度上是稳定的,相对存在概率较高的许多地区都位于保护区之外。尽管在一定程度上可能与厄尔尼诺南方涛动对吕温洋流的影响有关,但PCMP组合显示出相对较高的时空稳定性。