Fish community structure and driving factors in Lugu Lake, Southwest China

doi:10.17520/biods.2025339

Abstract

Abstract:

Aims: Lugu Lake, a significant plateau deep-water lake in Southwest China, has not had its fish community reported in recent years. This study was to investigate the current status of fish communities in Lugu Lake.

Methods: We conducted four field surveys in spring (May) and autumn (October) of 2023 and 2024, and employed redundancy analysis (RDA) and clustering methods to elucidate the driving effects of environmental factors on the spatiotemporal patterns of fish community structure.

Results: A total of 14 fish species were identified, belonging to 2 orders, 4 families, with Cypriniformes being the predominant order (85.71%). The only indigenous fish species recorded was Misgurnus anguillicaudatus, while 13 exotic fish species were recorded, constituting 92.86% of the total species, with Carassius auratus and Pseudorasbora parva being the most abundant. RDA revealed that fish community structure was influenced by NO₃^‒-N and pH in spring, and by NO₃^‒-N and total nitrogen in autumn. The abundance-biomass comparison curve (ABC) showed that the biomass curve in autumn was significantly higher than the abundance curve, presenting an “autumn stable–spring substable state” pattern.

Conclusion: To address the challenges faced by the fish community in Lugu Lake, such as the decline of indigenous species and the prevalence of exotic species, we recommend focusing on conserving indigenous fish, enhancing pollution control, regulating the release of exotic species, and establishing a comprehensive long-term monitoring program.

Key words: fish resources, community structure, diversity index, temporal and spatial variation

Kaifei Li, Jinling Gong, Feifei Hu, Xuemei Li, Zhaoyuan Lu, Mingzhong Luo, Tingbing Zhu. Fish community structure and driving factors in Lugu Lake, Southwest China[J]. Biodiv Sci, 2026, 34(6): 25339.

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URL: https://www.biodiversity-science.net/EN/10.17520/biods.2025339

https://www.biodiversity-science.net/EN/Y2026/V34/I6/25339

Figures/Tables 8

References 38

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物种 Species	总计	2023				2024				相对重要性指数 IRI	分类 Classification
	Total	5月 May		10月 October		5月 May		10月 October
		数量Number	出现率F%	数量Number	出现率F%	数量Number	出现率F%	数量Number	出现率F%
鲤形目 Cypriniformes
鲤科 Cyprinidae
棒花鱼 Abbottina rivularis	302	144	100	20	42.86	98	71.43	40	71.43	727	重要种(C)
䱗 Hemiculter leucisculus	72	16	14.29	11	42.86	43	42.86	2	28.57	97	一般种(G)
麦穗鱼 Pseudorasbora parva	685	134	100	108	85.71	412	100	31	100	1,763	优势种(D)
鲫 Carassius auratus	1,278	479	100	328	100	440	100	31	85.71	8,509	优势种(D)
鲤 Cyprinus carpio	181	67	85.71	49	71.43	59	100	6	28.57	1,089	优势种(D)
鲢 Hypophthalmichthys molitrix	35	3	28.57	25	71.43	4	28.57	3	28.57	362	重要种(C)
散鳞镜鲤 Cyprinus carpio var. specularis	48	21	42.86	8	42.86	15	28.57	4	42.86	43	一般种(G)
鳙 Hypophthalmichthys nobilis	7	3	28.57	-	-	2	28.57	2	28.57	58	一般种(G)
草鱼 Ctenopharyngodon idella	3	1	14.29	1	14.29	1	14.29	-	-	1	少见种(R)
中华鳑鲏 Rhodeus sinensis	641	148	71.43	203	85.71	254	85.71	36	85.71	1,429	优势种(D)
鳅科 Cobitidae
大鳞副泥鳅 Paramisgurnus dabryanus	65	35	57.14	6	28.57	21	28.57	3	28.57	75	一般种(G)
泥鳅 Misgurnus anguillicaudatus*	12	2	28.57	-	-	10	14.29	-	-	4	少见种(R)
鲈形目 Perciformes
虾虎鱼科 Gobiidae
真吻虾虎鱼 Rhinogobius similis	235	10	42.86	112	85.71	98	85.71	15	71.43	422	重要种(C)
塘鳢科 Eleotridae
小黄黝鱼 Hypseleotris swinhonis	41	-	-	-	-	23	42.86	18	85.71	30	一般种(G)

物种 Species	总计	2023				2024				相对重要性指数 IRI	分类 Classification
	Total	5月 May		10月 October		5月 May		10月 October
		数量Number	出现率F%	数量Number	出现率F%	数量Number	出现率F%	数量Number	出现率F%
鲤形目 Cypriniformes
鲤科 Cyprinidae
棒花鱼 Abbottina rivularis	302	144	100	20	42.86	98	71.43	40	71.43	727	重要种(C)
䱗 Hemiculter leucisculus	72	16	14.29	11	42.86	43	42.86	2	28.57	97	一般种(G)
麦穗鱼 Pseudorasbora parva	685	134	100	108	85.71	412	100	31	100	1,763	优势种(D)
鲫 Carassius auratus	1,278	479	100	328	100	440	100	31	85.71	8,509	优势种(D)
鲤 Cyprinus carpio	181	67	85.71	49	71.43	59	100	6	28.57	1,089	优势种(D)
鲢 Hypophthalmichthys molitrix	35	3	28.57	25	71.43	4	28.57	3	28.57	362	重要种(C)
散鳞镜鲤 Cyprinus carpio var. specularis	48	21	42.86	8	42.86	15	28.57	4	42.86	43	一般种(G)
鳙 Hypophthalmichthys nobilis	7	3	28.57	-	-	2	28.57	2	28.57	58	一般种(G)
草鱼 Ctenopharyngodon idella	3	1	14.29	1	14.29	1	14.29	-	-	1	少见种(R)
中华鳑鲏 Rhodeus sinensis	641	148	71.43	203	85.71	254	85.71	36	85.71	1,429	优势种(D)
鳅科 Cobitidae
大鳞副泥鳅 Paramisgurnus dabryanus	65	35	57.14	6	28.57	21	28.57	3	28.57	75	一般种(G)
泥鳅 Misgurnus anguillicaudatus*	12	2	28.57	-	-	10	14.29	-	-	4	少见种(R)
鲈形目 Perciformes
虾虎鱼科 Gobiidae
真吻虾虎鱼 Rhinogobius similis	235	10	42.86	112	85.71	98	85.71	15	71.43	422	重要种(C)
塘鳢科 Eleotridae
小黄黝鱼 Hypseleotris swinhonis	41	-	-	-	-	23	42.86	18	85.71	30	一般种(G)