Spatiotemporal dynamics of subarctic intertidal macrobenthos: going their own ways

IF 1.1 4区 生物学 Q3 MARINE & FRESHWATER BIOLOGY Journal of the Marine Biological Association of the United Kingdom Pub Date : 2024-03-18 DOI:10.1017/s0025315424000237
Andrey I. Azovsky, Margarita V. Chikina, Mikhail Yu. Kolobov, Andrey D. Naumov, Alexei A. Udalov
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Abstract

Intertidal macrobenthos at the small Chernaya Bight (the White Sea) was surveyed six times during 1993–2018 in order to study spatiotemporal variability. Distributions of sediments and macrophytes were highly variable in both space and time, as were most macrofaunal community attributes. Biomass slightly increased with time, while no long-term trends were found in total abundance, diversity, or functional structure. All community attributes were patchily distributed across the beach, and their patterns were not spatially autocorrelated and poorly associated with sediment properties, but changed considerably from year to year. Temporal changes in the community composition were considerable but less substantial compared with the spatial variations. The overall dynamics of species structure did not show any regular trend-like pattern but formed quasicyclic trajectories in ordination space, with nondirectional, spatially noncorrelated fluctuations around some relatively stable state. Comparison with two other neighbouring intertidal sites, studied annually in 1987–2017, showed that macrofauna at every site had similar average biomasses and common dominant species; however, the communities maintained their specificity in structure and exhibited distinct types of dynamics. In particular, the communities demonstrated different long-term trends in total biomass and diversity and followed their own paths in dynamics, appearing as differently oriented interannual trajectories. Nine most abundant species revealed no significant among-site correlations in abundance, and only two bivalve species showed good intersite agreement in dynamics of biomass. We suggest that local benthic communities are largely influenced by site-specific environmental conditions, resulting in independent and even opposite patterns of dynamics in neighbouring localities.

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亚北极潮间带大型底栖生物的时空动态:各行其是
为了研究时空变异性,1993-2018 年期间对切尔纳亚湾(白海)潮间带大型底栖生物进行了六次调查。沉积物和大型底栖生物的分布在空间和时间上都变化很大,大多数大型底栖生物群落属性也是如此。生物量随着时间的推移略有增加,而总丰度、多样性或功能结构则没有发现长期趋势。所有群落属性在海滩上都呈斑块状分布,其模式在空间上不具有自相关性,与沉积物性质的关联性较差,但每年的变化很大。群落组成的时间变化很大,但与空间变化相比幅度较小。物种结构的总体动态并没有表现出任何规律性的趋势模式,而是在排序空间中形成了类圆轨迹,围绕着某种相对稳定的状态进行非定向、非空间相关的波动。与其他两个相邻的潮间带地点(1987-2017 年期间每年进行一次研究)进行比较后发现,每个地点的大型底栖生物都具有相似的平均生物量和共同的优势物种;但是,群落结构保持了其特殊性,并表现出不同类型的动态变化。特别是,群落在总生物量和多样性方面表现出不同的长期趋势,并遵循各自的动态路径,呈现出不同方向的年际轨迹。九种最丰富的物种在丰度上没有明显的地点间相关性,只有两种双壳类在生物量动态上表现出良好的地点间一致性。我们认为,当地底栖生物群落在很大程度上受到特定地点环境条件的影响,从而导致相邻地点出现独立甚至相反的动态模式。
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来源期刊
CiteScore
2.30
自引率
8.30%
发文量
68
审稿时长
3-8 weeks
期刊介绍: JMBA is an international journal, publishing original research on all aspects of marine biology. It includes pioneering work taking place today on major issues concerning marine organisms and their environment. Subjects covered include: ecological surveys and population studies of marine communities; physiology and experimental biology; taxonomy, morphology and life history of marine animals and plants; and chemical and physical oceanographic work. Included with 2010 online subscriptions: Marine Biodiversity Records.
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