Decadal changes in zooplankton biomass, composition, and body mass in four shallow brackish lakes in Denmark subjected to varying degrees of eutrophication

He, Hongbo; Bruhn, Dan; Yde, Morten; Hansen, Jacob Kjerulf; Spanggaard, Lasse; Madsen, Niels; Liu, Wei; Søndergaard, Martin; Lauridsen, Torben L.

doi:10.1080/20442041.2020.1732782

Cited by 11 publications

(9 citation statements)

References 25 publications

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“…Salinization of lakes may inhibit zooplankton and thus promote the development of phytoplankton being released from grazing (O'Neil et al, 2012;Jeppesen et al, 2015;Hintz and Relyea, 2019;He et al, 2020;Jeppesen et al, 2020a). Moreover, greatly decreased diversity, abundance, and hatching rates of zooplankton have been observed at high salinities (Schallenberg et al, 2003;Jeppesen et al, 2015), and a test of five cladocerans (Alona rectangula, Daphnia pulex, Moina macrocopa, Ceriodaphnia dubia, and Simocephalus vetulus) exposed to high salinity showed strongly reduced survival and reproduction (Sarma et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Interactive effects of nutrients and salinity on zooplankton in subtropical plateau lakes with contrasting water depth

Yang

Yue

Jiang

et al. 2023

Front. Environ. Sci.

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Both eutrophication and salinization are growing global environmental problems in freshwater ecosystems, threatening the water quality and various aquatic organisms. However, little is known about their interactive effects on theses stressors and the role of lake depth on these interactions. We used field surveys to compared zooplankton assemblages over four seasons in eight Yunnan Plateau lakes with different trophic states, salinization levels, and water depths. The results showed that: 1) the species number (S), density (DZoop), and biomass (BZoop) of zooplankton exhibited strong seasonal dynamics, being overall higher in the warm seasons. 2) Data collected over four seasons and summer data both revealed highly significant positive relationships of S, DZoop, and BZoop with total nitrogen (TN), total phosphorus (TP), and phytoplankton chlorophyll a (Chl a). 3) S, DZoop, and BZoop displayed a unimodal relationship with salinity, peaking at 400–1000 μS/cm (conductivity, to reflect salinity). 4) The two large-sized taxa (cladocerans and copepods) generally increased at low-moderate levels of TN, TP, Chl a, and Cond and was constant or decreased at high levels. The average body mass (biomass/density) of crustaceans decreased with increasing TN, TP, Chl a, and conductivity. Our findings indicate that zooplankton may be more vulnerable in deep lakes than in shallow lakes when exposed to conductivity stress even under mesotrophic conditions, and the overall decrease in size in zooplankton assemblages under the combined stress of eutrophication and salinization may result in a lowered grazing effect on phytoplankton.

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Section: Introductionmentioning

confidence: 99%

Interactive effects of nutrients and salinity on zooplankton in subtropical plateau lakes with contrasting water depth

Yang

Yue

Jiang

et al. 2023

Front. Environ. Sci.

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“…and the many related and interesting outdoor experimental studies of high quality on saline systems, such as Bales et al (1993), Barker et al (2008a), and McGowan et al (2020) and references therein. These studies have been a major sources of inspiration for the paper (He et al 2020) that we present to honour him in this special issue." Nicolas Vidal and Mariana Meerhoff wrote:…”

Section: Brian Moss: the Wizard Of Shallow Lakesmentioning

confidence: 84%

“…Each of the contributors to this Special Issue has written a personal statement about how Brian affected their outlook, scientific lives, and specifically influenced the paper they contributed. These papers cover some of Brian's many wide-ranging interests, including nutrient dynamics and trophic state in small shallow lakes (Maberly et al 2020), use of large-scale comparisons (Beklioğlu et al 2020, experiments using mesocosms (McGowan et al 2020), food web interactions (He et al 2020, Vidal et al 2020, training and supporting research in developing countries (Pavon-Meza et al 2020, Valencia-Vargas et al 2020, and how to manage lakes effectively (Søndergaard et al 2020).…”

Section: Brian Moss: the Wizard Of Shallow Lakesmentioning

confidence: 99%

“…He promoted the idea of interactions among trophic levels as being a key mechanism controlling how these systems operated. Two papers touch on these issues, those of He et al (2020) and Vidal et al (2020). Hu He wrote: "I met Brian Moss for the first time at the SIL 2009 symposium in Nanjing, China, and was impressed by his talk.…”

Section: Brian Moss: the Wizard Of Shallow Lakesmentioning

confidence: 99%

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Brian Moss: the wizard of shallow lakes

et al. 2020

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“…Pollution of freshwater bodies with phosphorus and associated changes in light climate result in increased phytoplankton P content worldwide (Sterner et al 2008). Most of the work addressing the effects of eutrophication on zooplankton focus on indirect effects via toxic cyanobacterial bloom formation (Amorim and Moura 2021) or increased levels of fish predation pressure (He et al 2020). Although the potential importance of the stoichiometric knife-edge is increasingly recognized among researchers in the field of ecological stoichiometry (Yang et al 2016;Currier and Elser 2017), its potential consequences on aquatic food webs remains largely underappreciated among aquatic ecologists in general.…”

Section: Discussionmentioning

confidence: 99%

A critical assessment of the stoichiometric knife-edge: no evidence for artifacts caused by the experimental P-supplementation of algae

Zhou

Declerck

2021

Aquat Ecol

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The stoichiometric knife-edge refers to the reduced performance of consumers encountering food with excess phosphorus (P) relative to carbon (C) or nitrogen (N). Studies that provide evidence for such knife-edge in aquatic systems often apply phosphate supplementation to create P-rich food treatments. However, this method may suffer from artifacts, because after uptake algae may store P in a form different from the P-rich biomolecules typically consumed by zooplankton. Our aim was to test if P supplementation results in potential biases. We experimentally exposed populations of the herbivore rotifer species, Brachionus calyciflorus (Pallas), to four different food quality treatments: algae grown under P-saturating (HPchem, molar C:P ratio = 59.7 ± 2.7) and P-sufficient (MPchem, molar C:P = 116.3 ± 5.2) conditions in chemostats, and algae grown under P-limiting conditions, but with molar C:P ratios equal to HPchem and MPchem treatments, respectively (HPLP+P, molar C:P = 59.8 ± 0.14; MPLP+P, molar C:P = 121.0 ± 4.3). The latter two treatments were achieved through P-supplementation of P-limited algae. Results show that for rotifers fed algae with either excess or intermediate P content, population growth rates were consistently higher on algae grown in chemostats than algae treated with the P supplementation method. Importantly, growth rates were also consistently lower in HP than in MP treatments and the magnitude of this negative impact was independent on algal growth history. The latter result confirms the existence of a stoichiometric knife-edge and indicates that P supplementation is a reliable method to study the relative effect of excess P on zooplankton performance in a standardized way.

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Decadal changes in zooplankton biomass, composition, and body mass in four shallow brackish lakes in Denmark subjected to varying degrees of eutrophication

Cited by 11 publications

References 25 publications

Interactive effects of nutrients and salinity on zooplankton in subtropical plateau lakes with contrasting water depth

Interactive effects of nutrients and salinity on zooplankton in subtropical plateau lakes with contrasting water depth

Brian Moss: the wizard of shallow lakes

A critical assessment of the stoichiometric knife-edge: no evidence for artifacts caused by the experimental P-supplementation of algae

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