Calcium Concentration Regulates Interspecific Interaction of Algae Along the Nutrient Gradient

IF 2.6 2区生物学 Q2 ECOLOGY

Freshwater Biology Pub Date : 2026-08-14 DOI:10.1111/fwb.70282

QingShi Zhou, ZhanPeng Pan, XinYi Li, Yang Gao

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引用次数: 0

Abstract

Although many studies have focused on the influence of abiotic stress gradients on biological interactions, few have examined the effects of both resource and non-resource stresses on facilitation.
We conducted a controlled experiment to study the effects of nutrient stress on the interspecific interaction between Phormidium corium and Scenedesmus quadricauda along calcium gradient.
The results showed that elevated calcium concentration changed the interspecific relationship among algae with nutrient stress. When the calcium stress was low, the relationship between P. corium and S. quadricauda changed from competition to facilitation with the increase of nutrient stress gradient. In a nutrient-stress environment, the population density and the encounter rate are typically low. Facilitation improves these harsh environments and makes them more beneficial for the beneficiary species.
When the calcium stress was high, facilitation peaked under medium resource stress. This phenomenon may be caused by the interaction between salt stress and nutrients. High calcium stress is conducive to the absorption of nutrients by algae. The facilitation effect is strongest in a medium calcium stress environment owing to relatively sufficient resources.
These results emphasize the importance of non-resource stress in interspecific relationships, highlight a new direction for the study of facilitation, and provide theoretical guidance for studying the influencing factors of algal competition.

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来源期刊

Freshwater Biology 生物-海洋与淡水生物学

CiteScore

5.90

自引率

3.70%

发文量

162

审稿时长

2 months

期刊介绍： Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.