Adaptability of Chaetomorpha valida (Ulvophyceae) spores to salinity, nutrients and water flow in aquaculture ponds and its invasive evaluation

IF 2.2 4区环境科学与生态学 Q3 ECOLOGY

Aquatic Ecology Pub Date : 2026-08-20 DOI:10.1007/s10452-026-10344-9

Dongyue Li, Ronglian Xing, Rui Li, Xuebin Cao, Shujun Hu, Xiaojing Pan, Hongxia Zhang, Lihong Chen, Zhen Yu

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引用次数: 0

Abstract

The alien species Chaetomorpha valida, first found in sea cucumber ponds in Liaoning and Shandong, has severely harmed China’s ecology, economy, and society. The periodic abundance of this alga greatly affects water quality and sometimes leads to the loss of aquaculture. Spore reproduction may be one of the main reasons for its rapid growth. Adaptability to the environment also determines its rapid adaptation and expansion of territory. However, the invasion potential remains poorly understood. We investigated reproductive characteristics in different lengths of fragments excised from C. valida, the detailed process and environmental adaptation conditions of spore reproduction and the variation of the enzyme activity of cells during sporangium formation. Results: shorter fragments boosted spore reproduction (more sporangia, spore release) but reduced vegetative reproduction; algal cell oxidation favored sporangium formation. Salinity 20–30 psu best promoted sporangium formation/release (salinity 40 psu inhibited both); high nitrogen enhanced sporangium production. Low water flow promoted spore release, high flow inhibited it and reduced spore attachment. Suitable fragment lengths and environments enabled massive spore production and new individual development, so spore-producing fragments drive C. valida’s biomass accumulation. Analyzing spore reproduction/germination helped predict its spread, aiding biological invasion control.

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验证Chaetomorpha valida （Ulvophyceae）孢子对养殖池塘盐度、营养物和水流的适应性及其侵入性评价

在辽宁和山东的海参池中首次发现的外来物种，对中国的生态、经济和社会造成了严重的危害。这种藻类的周期性丰富极大地影响了水质，有时导致水产养殖的损失。孢子繁殖可能是其快速生长的主要原因之一。对环境的适应性也决定了它的快速适应和领土的扩张。然而，入侵的可能性仍然知之甚少。研究了不同长度的假丝酵母片段的生殖特性，孢子繁殖的详细过程和环境适应条件，以及孢子囊形成过程中细胞酶活性的变化。结果：短片段促进孢子繁殖（孢子囊增多，孢子释放增多），但减少营养繁殖；藻类细胞氧化有利于孢子囊的形成。盐度20 ~ 30 psu促进孢子囊形成/释放效果最好（盐度40 psu对两者均有抑制作用）；高氮促进孢子囊生成。小流量促进孢子释放，大流量抑制孢子释放，降低孢子附着。适宜的片段长度和环境有利于大量产孢和新个体的发育，因此产孢片段推动了假丝霉生物量的积累。分析孢子的繁殖/萌发有助于预测其传播，有助于生物入侵控制。

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来源期刊

Aquatic Ecology 环境科学-海洋与淡水生物学

CiteScore

3.90

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Aquatic Ecology publishes timely, peer-reviewed original papers relating to the ecology of fresh, brackish, estuarine and marine environments. Papers on fundamental and applied novel research in both the field and the laboratory, including descriptive or experimental studies, will be included in the journal. Preference will be given to studies that address timely and current topics and are integrative and critical in approach. We discourage papers that describe presence and abundance of aquatic biota in local habitats as well as papers that are pure systematic. The journal provides a forum for the aquatic ecologist - limnologist and oceanologist alike- to discuss ecological issues related to processes and structures at different integration levels from individuals to populations, to communities and entire ecosystems.