Distinct response of total and active fungal communities and functions to seasonal changes in a semi‐enclosed bay with mariculture (Dongshan Bay, Southern China)

Author:

Xu Wei12,Yang Change1,Luo Yu12,Zhang Kai1,Chen Mingliang134,Jiang Shuangcheng5,Grossart Hans‐Peter67ORCID,Luo Zhuhua1234ORCID

Affiliation:

1. Key Laboratory of Marine Biogenetic Resources Third Institute of Oceanography, Ministry of Natural Resources Xiamen China

2. School of Advanced Manufacturing Fuzhou University Jinjiang China

3. Co‐Innovation Center of Jiangsu Marine Bioindustry Technology Jiangsu Ocean University Lianyungang China

4. Marine Biology College, Xiamen Ocean Vocational College Xiamen China

5. Fisheries Research Institute of Fujian Xiamen China

6. Department of Experimental Limnology Leibniz Institute of Freshwater Ecology and Inland Fisheries Stechlin Germany

7. Institute of Biochemistry and Biology, Postdam University Potsdam Germany

Abstract

AbstractIncreasing evidence suggests that fungal communities are key components of biogeochemical cycles in coastal ecosystems. However, at a regional scale, the major drivers of the seasonal and spatial distribution of fungi in areas impacted by mariculture remain largely unknown. Intensive aquaculture takes place in Dongshan Bay of Fujian, China, a typical subtropical marine ecosystem with multiple environmental gradients extensively perturbed by anthropogenic activities. To better understand the consequences of mariculture on fungal community composition and activities, we simultaneously evaluated the temporal (four different seasons) and spatial dynamics in total (DNA) and active (RNA) fungal communities of Dongshan Bay in relation to several major physicochemical properties. Our results revealed that fungal communities in the Bay were highly diverse, but showed the ubiquitous dominance of Dikarya and the occasional predominance of Glomeromycota, Mucoromycota, Mortierellomycota, Chytridiomycota, Olpidiomycota, and Rozellomycota. Fungal diversity varied much more with season than with the degree of aquaculture activity, for both total and active communities. This notion is supported by co‐occurrence networks exhibiting a clear seasonal pattern. Furthermore, fungal community structure in coastal waters showed distinct relationships with environmental factors varying both with season and in space. For both total and active fungal communities, a combination of environmental variables including temperature, dissolved oxygen, and nitrite exhibited the greatest impact on community structure. Our study demonstrates a distinct spatiotemporal dynamics of both total and active fungi and provides a foundation to better understand the ecological roles of marine fungi in coastal ecosystems in relation to mariculture activities.

Funder

National Natural Science Foundation of China

Natural Science Foundation of Fujian Province

Natural Science Foundation of Xiamen City

Publisher

Wiley

Subject

Aquatic Science,Oceanography

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