Plankton and macrobenthos status and analysis of resources of the Heishi River, Chongzhou City
Received date: 2024-04-07
Revised date: 2024-05-06
Online published: 2026-03-12
Copyright
In order to find out the current status of plankton and macrobenthos resources in the Heishi River Basin, Chongzhou City, Sichuan Province, a systematic survey and analysis of the resource status of plankton and macrobenthos and their community structure characteristics were carried out in October 2023 in the basin. The results of the study showed that 125 species of phytoplankton (including variants) from 47 genera in 6 phyla were identified in the Heishi River Basin, with a total mean abundance of 34.11×104 ind./L and a total mean biomass of 0.324 7 mg/L. The diatom phylum had the relatively highest number of species, total mean abundance, and total mean biomass; and there were 30 species of 15 genera of phytoplankton, with a total mean abundance of 19.09 ind./L total mean biomass of 0.053 6 mg/L, of which protozoa had the highest abundance and copepods had the highest biomass, 12 orders and 27 species of macrobenthos, with a total mean abundance of 18.2 ind./m2 and a total mean biomass of 3.223 7 g/m2, of which aquatic insects had the highest number of species and total mean abundance and molluscs had the highest biomass. The structural characteristics of aquatic communities in the Heishi River Basin in Chongzhou City were obvious. Among them, the plankton species and resources were high, and among the phytoplankton, diatoms were absolutely dominant; in terms of macrobenthos, there were more clean-water-loving species in the upstream area, while the middle and lower reaches were dominated by species with higher pollution tolerance. The results of this study can help to better manage the fishery resources in the Heishi River Basin and develop corresponding conservation strategies.
Zhang Zhiyuan , Zhang Zepeng , Ren Jiu , Hu Jiaxiang , Chen Jiao , Wang Xiongyan . Plankton and macrobenthos status and analysis of resources of the Heishi River, Chongzhou City[J]. Wetland Science, 2025 , 23(4) : 783 -790 . DOI: 10.13248/j.cnki.wetlandsci.20240098
1 Water temperature and pH of sampling sites in the Heishi River Basin黑石河流域各采样点水温和pH |
| 采样点 | 水温/℃ | pH |
| C1 | 16.8 | 9.17 |
| C2 | 20.8 | 9.19 |
| C3 | 18.3 | 8.98 |
| C4 | 17.9 | 8.98 |
| C5 | 18.3 | 9.08 |
| C6 | 17.7 | 9.07 |
2 Zooplankton dominant species and their dominance indices in the Heishi River Basin黑石河流域浮游生物优势种及其优势度指数 |
| 生物类群 | 优势种 | 出现 频率fi | 优势度 指数Y |
| 浮游植物 | 短小曲壳藻 Achnanthes curta | 0.5 | 0.04 |
| 近缘曲壳藻 Achnanthes affinis | 0.7 | 0.06 | |
| 克里格辐节藻 Stauroneis kriegeri | 0.5 | 0.03 | |
| 施密斯辐节藻 Stauroneis smithii | 0.3 | 0.02 | |
| 双头辐节藻 Stauroneis anceps | 0.3 | 0.02 | |
| 系带舟形藻 Navicula cincta | 0.8 | 0.05 | |
| 钝脆杆藻 Fragilaria capucina | 0.8 | 0.02 | |
| 普通等片藻 Diataoma vulgare | 0.8 | 0.03 | |
| 线形棒条藻 Rhabdoderma lineare | 1.0 | 0.02 | |
| 浮游动物 | 钩足平直溞 Pleuroxus hamulatus | 0.2 | 0.12 |
| 广布中剑水蚤 Mesocyclops leuckarti | 0.3 | 0.03 |
3 Dominant species of macrobenthos and their relative importance indices in the Heishi River Basin黑石河流域大型底栖动物优势种及其相对重要指数 |
| 大型底栖动物优势种 | 相对重要指数IRI |
| 摇蚊科幼虫 Chironomidae larva | 995 |
| 划蝽科幼虫Corixidae larva | 123 |
| 瘦蟌 Ischnura sp. | 103 |
| 锯齿新米虾 Neocaridina denticulata | 1 778 |
| 颤蚓 Tubifex sp. | 112 |
| 萝卜螺 Radix sp. | 152 |
| 纹沼螺 Parafossarulus striatulus | 634 |
| 环棱螺 Bellamya sp. | 2 142 |
4 Aquatic biodiversity in the Heishi River Basin黑石河流域水生生物多样性 |
| 生物类群 | Shannon-Wiener 多样性指数 | Pielou 均匀度指数 | Margalef 丰富度指数 |
| 注:表中数据为平均值±标准误差。 | |||
| 浮游植物 | 3.08±0.83 | 0.79±0.17 | 3.78±0.63 |
| 浮游动物 | 1.55±0.57 | 0.80±0.13 | 2.25±1.38 |
| 大型底栖动物 | 1.41±0.73 | 0.79±0.25 | 1.89±1.08 |
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