Distribution characteristics and influencing factors of benthic diatoms on several typical beaches along the southern coast of China

IF 3 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Marine environmental research Pub Date : 2024-11-19 DOI:10.1016/j.marenvres.2024.106854

Min Chen , Jiayu Li , Guobiao Huang , Yanting Lin , Shuting Zeng , Ya Xu , Xuan Liu , Feng Cai , Hongshuai Qi

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Abstract

Benthic diatoms are the primary beach vegetation on sandy coasts, acting as the main primary producers in such environments. Changes in their community structure and biomass can have substantial impact on both the entire micro-food web and the nearshore shallow marine ecosystem. This study focused on four typical beaches along the southern coast of China (Fuzhou Changle Beach, Xiamen Huizhan Beach, Xiamen Guanyinshan Beach, and Beihai Silver Beach). Analysis of benthic diatoms and environmental factors revealed that the distribution of benthic diatom communities on the studied beaches is influenced by elevation, salinity changes due to freshwater inputs, sediment composition, and hydrodynamic factors. The most important factor is elevation, which reflects the location of the beach in the tidal zone. On Beihai Silver Beach and the Xiamen beaches, the mid-tidal and low tidal zones are more conducive to growth and reproduction of benthic diatoms, and some diatom species show preference for different tidal zones. On dissipative beaches, benthic diatom abundance peaks in the mid-tidal zone, whereas on low tidal terrace beaches, diatom abundance is generally low in the high tidal zone and relatively high in the low tidal zone. Additionally, low tidal terrace beaches exhibit a “steep increase zone” of diatom abundance at the junction of the steep and gentle slopes, indicating that benthic diatom abundance responds more to this type of beach landform than to that of dissipative beaches.

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中国南部沿海几个典型海滩底栖硅藻的分布特征及其影响因素

底栖硅藻是沙质海岸的主要海滩植被，是此类环境中的主要初级生产者。其群落结构和生物量的变化会对整个微食物网和近岸浅海生态系统产生重大影响。本研究以中国南部沿海的四个典型海滩（福州长乐滩、厦门会展海滩、厦门观音山海滩和北海银滩）为研究对象。对底栖硅藻和环境因素的分析表明，所研究海滩的底栖硅藻群落分布受海拔高度、淡水输入引起的盐度变化、沉积物组成和水动力因素的影响。最重要的因素是海拔，它反映了海滩在潮汐带中的位置。在北海银滩和厦门海滩上，中潮带和低潮带更有利于底栖硅藻的生长和繁殖，一些硅藻种类对不同的潮带表现出偏好。在耗散海滩上，底栖硅藻的丰度在中潮汐区达到高峰，而在低潮阶地海滩上，硅藻丰度一般在高潮汐区较低，在低潮汐区相对较高。此外，在陡坡与缓坡的交界处，低潮位阶地海滩硅藻丰度呈现出 "陡增区"，这表明底栖硅藻丰度对这类海滩地貌的反应比对消散海滩的反应更大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine environmental research 环境科学-毒理学

CiteScore

5.90

自引率

3.00%

发文量

217

审稿时长

46 days

期刊介绍： Marine Environmental Research publishes original research papers on chemical, physical, and biological interactions in the oceans and coastal waters. The journal serves as a forum for new information on biology, chemistry, and toxicology and syntheses that advance understanding of marine environmental processes. Submission of multidisciplinary studies is encouraged. Studies that utilize experimental approaches to clarify the roles of anthropogenic and natural causes of changes in marine ecosystems are especially welcome, as are those studies that represent new developments of a theoretical or conceptual aspect of marine science. All papers published in this journal are reviewed by qualified peers prior to acceptance and publication. Examples of topics considered to be appropriate for the journal include, but are not limited to, the following: – The extent, persistence, and consequences of change and the recovery from such change in natural marine systems – The biochemical, physiological, and ecological consequences of contaminants to marine organisms and ecosystems – The biogeochemistry of naturally occurring and anthropogenic substances – Models that describe and predict the above processes – Monitoring studies, to the extent that their results provide new information on functional processes – Methodological papers describing improved quantitative techniques for the marine sciences.