Resisting annihilation: relationships between functional trait dissimilarity, assemblage competitive power and allelopathy

Muhl, Rika M.W.; Roelke, Daniel L.; Zohary, Tamar; Moustaka‐Gouni, Maria; Sommer, Ulrich; Borics, Gábor; Gaedke, Ursula; Withrow, Frances G.; Bhattacharyya, Joydeb

doi:10.1111/ele.13109

Cited by 12 publications

(7 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase and dominance of cyanobacteria in a water body is indicative of water quality degradation, since cyanobacteria are implicated in food-web disturbances, oxygen depletion and animal mortality; and they have adverse effects on human health and on ecosystem services in general [9]. Furthermore, cyanobacterial species with allelopathic characteristics can alter phytoplankton composition and biodiversity [10]. It is, therefore, globally acknowledged that the management of lakes should aim at maintaining environmental heterogeneity while preventing further eutrophication and expansion of toxic and allelopathic cyanobacteria.…”

Section: Introductionmentioning

confidence: 99%

Ecological Connectivity in Two Ancient Lakes: Impact Upon Planktonic Cyanobacteria and Water Quality

Katsiapi

Genitsaris

Stefanidou

et al. 2019

Water

Self Cite

View full text Add to dashboard Cite

The ancient lakes Mikri Prespa and Megali Prespa are located in SE Europe at the transnational triangle and are globally recognized for their ecological significance. They host hundreds of flora and fauna species, and numerous types of habitat of conservational interest. They also provide a variety of ecosystem services. Over the last few decades, the two lakes have been interconnected through a surface water channel. In an attempt to explore whether such a management practice might alter the ecological properties of the two lakes, we investigated a series of community metrics for phytoplankton by emphasizing cyanobacteria. Our results demonstrate that the cyanobacterial metacommunity structure was affected by directional hydrological connectivity and high dispersal rates, and to a lesser extent, by cyanobacterial species sorting. Cyanobacterial alpha diversity was twofold in the shallow upstream Lake Mikri Prespa (Simpson index average value: 0.70) in comparison to downstream Lake Megali Prespa (Simpson index average value: 0.37). The cyanobacterial assemblage of the latter was only a strict subset of that in Mikri Prespa. Similarly, beta diversity components clearly showed a homogenization of cyanobacteria, supporting the hypothesis that water flow enhances fluvial translocation of potentially toxic and bloom-forming cyanobacteria. Degrading of the water quality in the Lake Megali Prespa in anticipation of improving that of the Lake Mikri Prespa is an issue of great concern for the Prespa lakes' protection and conservation.

show abstract

Section: Introductionmentioning

confidence: 99%

Ecological Connectivity in Two Ancient Lakes: Impact Upon Planktonic Cyanobacteria and Water Quality

Katsiapi

Genitsaris

Stefanidou

et al. 2019

Water

Self Cite

View full text Add to dashboard Cite

show abstract

“…It has been demonstrated that the so-called ''lumpy coexistence'' is characteristic for phytoplankton assemblages (Graco-Roza et al, 2019). Lumpy coexistence arises in fluctuating resource environments (Sakavara et al, 2018;Roelke et al, 2019), and show higher resilience to species invasions (Roelke & Eldridge, 2008) and higher resistance to allelopathy (Muhl et al, 2018).…”

Section: Amalgamation Of the Equilibrium And Non-equilibrium Conceptsmentioning

confidence: 99%

Freshwater phytoplankton diversity: models, drivers and implications for ecosystem properties

et al. 2020

Self Cite

View full text Add to dashboard Cite

Our understanding on phytoplankton diversity has largely been progressing since the publication of Hutchinson on the paradox of the plankton. In this paper, we summarise some major steps in phytoplankton ecology in the context of mechanisms underlying phytoplankton diversity. Here, we provide a framework for phytoplankton community assembly and an overview of measures on taxonomic and functional diversity. We show how ecological theories on species competition together with modelling approaches and laboratory experiments helped understand species coexistence and maintenance of diversity in phytoplankton. The nonequilibrium nature of phytoplankton and the role of disturbances in shaping diversity are also discussed. Furthermore, we discuss the role of water body size, productivity of habitats and temperature on phytoplankton species richness, and how diversity may affect the functioning of lake ecosystems. At last, we give an insight into molecular tools that have emerged in the last decades and argue how it has broadened our perspective on microbial diversity. Besides historical backgrounds, some critical comments have also been made.

show abstract

“…Accordingly, we proposed the following hypotheses: (1) autotoxicity is the main factor affecting seedling growth in C. migao, and (2) the main mechanism of autotoxicity is that decomposition and release of autotoxic substances from the litter of C. migao can be achieved by altering the soil environment (chemical property, soil enzyme activity, and fungi) to inhibit seedling growth and survival. To test these hypotheses, we adopted a method of irrigating the aqueous extract and simulated the effects of litter decomposition and release from different anatomical parts of C. migao on seedling growth under field conditions from the new perspective of plant autotoxicity [30]. The changes in morphology, physiological metabolism, soil substrate, and fungi, which are the four key factors affecting plant growth, were determined during seedling growth.…”

Section: Plant Materialsmentioning

confidence: 99%

Autotoxicity Hinders the Natural Regeneration of Cinnamomum migao H. W. Li in Southwest China

Huang

Jing-zhong

Liu

et al. 2019

Forests

View full text Add to dashboard Cite

Autotoxicity is a widespread phenomenon in nature and is considered to be the main factor affecting new natural recruitment of plant populations, which was proven in many natural populations. Cinnamomum migao H. W. Li is an endemic medicinal woody plant species mainly distributed in Southwestern China and is defined as an endangered species by the Red Paper of Endangered Plants in China. The lack of seedlings is considered a key reason for population degeneration; however, no studies were conducted to explain its causes. C. migao contains substances with high allelopathic potential, such as terpenoids, phenolics, and flavonoids, and has strong allelopathic effects on other species. Therefore, we speculate that one of the reasons for C. migao seedling scarcity in the wild is that it exhibits autotoxic allelopathy. In this study, which was performed from the perspective of autotoxicity, we collected leaves, pericarp, seeds, and branches of the same population; we simulated the effects of decomposition and release of litter from these different anatomical parts of C. migao in the field; and we conducted 210-day control experiments on seedling growth, with different concentration gradients, using associated aqueous extracts. The results showed that the leaf aqueous extract (leafAE) significantly inhibited growth indicators and increased damage of the lipid structure of the cell membrane of seedlings, suggesting that autotoxicity from C. migao is a factor restraining seedling growth. The results of the analyses of soil properties showed that, compared with the other treatments, leafAE treatment inhibited soil enzyme activity and also had an impact on soil fungi. Although leafAE could promote soil fertility to some extent, it did not change the effect of autotoxic substances on seedling growth. We conclude that autotoxicity is the main obstacle inhibiting seedling growth and the factor restraining the natural regeneration of C. migao.

show abstract

Resisting annihilation: relationships between functional trait dissimilarity, assemblage competitive power and allelopathy

Cited by 12 publications

References 69 publications

Ecological Connectivity in Two Ancient Lakes: Impact Upon Planktonic Cyanobacteria and Water Quality

Ecological Connectivity in Two Ancient Lakes: Impact Upon Planktonic Cyanobacteria and Water Quality

Freshwater phytoplankton diversity: models, drivers and implications for ecosystem properties

Autotoxicity Hinders the Natural Regeneration of Cinnamomum migao H. W. Li in Southwest China

Contact Info

Product

Resources

About