Environmental stress and reproductive mode in Mesaphorura macrochaeta (Tullbergiinae, Collembola)

Niklasson, Monica; Petersen, Henning; Parker, E. Davis

doi:10.1078/s0031-4056(04)70065-7

Cited by 25 publications

(16 citation statements)

References 20 publications

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“…did not reproduce in laboratory during eight months of monitoring, possibly because we found few specimens of males. It is known that in the Family Sminthurididae, the males choose the female and attach themselves with antennae modified for clasping (Niklasson et al, 2000).…”

Section: Sampling Of Collembolans and Culture Conditionsmentioning

confidence: 99%

Ecotoxicity of mercury to Folsomia candida and Proisotoma minuta (Collembola: Isotomidae) in tropical soils: Baseline for ecological risk assessment

Buch

Niemeyer

Correia

et al. 2016

Ecotoxicology and Environmental Safety

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Mercury (Hg) is a highly toxic nonessential trace metal. Despite its natural occurrence in the Earth's Crust, its concentrations have been steadily increasing in the environment due to anthropogenic sources. Recent studies have showed great concern about soil fauna, once the potential adverse effects of mercury concentrations in the environment of these invertebrates are still poorly understood, especially when linked to forest soils and tropical biota. Different collembolan species can show distinct toxicity effects to the contaminants, impairing its developing lifelong and affecting its diversity and abundance in the environment. Laboratory studies were performed to evaluate the ecotoxicity of Hg(II) to collembolan species collected in Brazil, Proisotoma minuta (autochthonous) and Folsomia candida (allochthonous), as a tool to predict effects in ecological risk assessment of tropical regions. Behavioral, acute and chronic tests were carried under temperatures of 20°C and 24°C using two test soils, natural and artificial, spiked with increasing mercury concentrations. F. candida was more sensitive to mercury contamination than P. minuta, presenting the most restrictive values of EC50 and LC50. Reproduction was a considerably more sensitive endpoint than avoidance and mortality. The 28-day lower EC50 values were found in chronic tests for F. candida in natural soil to 24°C (3.32mgHgkg(-1)), while for P. minuta was in tropical artificial soil to 20°C (4.43mgHgkg(-1)). There were similarity for each collembolan species to respond at the Hg(II) effects when exposed at 20°C and 24°C. F. candida can be suitable as a bioindicator species to mercury ecotoxicity tests in tropical forest soils.

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Section: Sampling Of Collembolans and Culture Conditionsmentioning

confidence: 99%

Ecotoxicity of mercury to Folsomia candida and Proisotoma minuta (Collembola: Isotomidae) in tropical soils: Baseline for ecological risk assessment

Buch

Niemeyer

Correia

et al. 2016

Ecotoxicology and Environmental Safety

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“…But which life-history and dispersal traits are favored by pollution? Sexual reproduction seems to be favored over clonal reproduction in severely polluted conditions (Niklasson et al 2000), and it has been suspected that some (apparently healthy) communities of polluted areas are maintained by high immigration rates compensating for high mortality (Møller et al 2012). Both features are typical of unspecialized species privileging phenotypic variety (Poisot et al 2011), with a high rate of nondirectional random movements to unfavorable places (Auclerc et al 2010).…”

Section: Civilizedmentioning

confidence: 99%

“…Sexual reproduction seems to be favored over clonal reproduction in severely polluted conditions (Niklasson et al. ), and it has been suspected that some (apparently healthy) communities of polluted areas are maintained by high immigration rates compensating for high mortality (Møller et al. ).…”

Section: Introductionmentioning

confidence: 99%

Disturbances, organisms and ecosystems: a global change perspective

Ponge

2013

Ecology and Evolution

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The present text exposes a theory of the role of disturbances in the assemblage and evolution of species within ecosystems, based principally, but not exclusively, on terrestrial ecosystems. Two groups of organisms, doted of contrasted strategies when faced with environmental disturbances, are presented, based on the classical r-K dichotomy, but enriched with more modern concepts from community and evolutionary ecology. Both groups participate in the assembly of known animal, plant, and microbial communities, but with different requirements about environmental fluctuations. The so-called “civilized” organisms are doted with efficient anticipatory mechanisms, allowing them to optimize from an energetic point of view their performances in a predictable environment (stable or fluctuating cyclically at the scale of life expectancy), and they developed advanced specializations in the course of evolutionary time. On the opposite side, the so-called “barbarians” are weakly efficient in a stable environment because they waste energy for foraging, growth, and reproduction, but they are well adapted to unpredictably changing conditions, in particular during major ecological crises. Both groups of organisms succeed or alternate each other in the course of spontaneous or geared successional processes, as well as in the course of evolution. The balance of “barbarians” against “civilized” strategies within communities is predicted to shift in favor of the first type under present-day anthropic pressure, exemplified among others by climate warming, land use change, pollution, and biological invasions.

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“…Harsh abiotic conditions may lead to an advantage of parthenogenetic reproduction, as in the case of geographic parthenogenesis (Song et al., ). However, intense abiotic stress in extreme habitats such as metal‐polluted sites (Gillet & Ponge, ) or seashores (Niklasson, Petersen, & Parker, ) may lead to the prevalence of sexuals in otherwise parthenogenetic populations, presumably because sexual species are better able to select for favorable genes when faced with stressed environments on intermediate time scales. At small spatial scales, temporal fluctuations of environmental conditions may contribute to sustaining both sexual and asexual populations in forest soils.…”

Section: Introductionmentioning

confidence: 99%

Driving factors and temporal fluctuation of Collembola communities and reproductive mode across forest types and regions

Pollierer

Scheu

2017

Ecology and Evolution

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Despite the major role of Collembola in forest soil animal food webs, ecological and evolutionary determinants of their community composition are not well understood. We investigated abundance, community structure, life forms, and reproductive mode of Collembola in four different forest types (coniferous, young managed beech, old managed beech, and unmanaged beech forests) representing different management intensities. Forest types were replicated within three regions across Germany: the Schorfheide‐Chorin, the Hainich, and the Swabian Alb, differing in geology, altitude, and climate. To account for temporal variation, samples were taken twice with an interval of 3 years. To identify driving factors of Collembola community structure, we applied structural equation modeling, including an index of forest management intensity, abiotic and biotic factors such as pH, C‐to‐N ratio of leaf litter, microbial biomass, and fungal‐to‐bacterial ratio. Collembola abundance, biomass, and community composition differed markedly between years, with most pronounced differences in the Schorfheide, the region with the harshest climatic conditions. There, temporal fluctuations of parthenogenetic Collembola were significantly higher than in the other regions. In the year with the more favorable conditions, parthenogenetic species flourished, with their abundance depending mainly on abiotic, density‐independent factors. This is in line with the “Structured Resource Theory of Sexual Reproduction,” stating that parthenogenetic species are favored if density‐independent factors, such as desiccation, frost or flooding, prevail. In contrast, sexual species in the same year were mainly influenced by resource quality‐related factors such as the fungal‐to‐bacterial ratio and the C‐to‐N ratio of leaf litter. The influence of forest management intensity on abundances was low, indicating that disturbance through forest management plays a minor role. Accordingly, differences in community composition were more pronounced between regions than between different forest types, pointing to the importance of regional factors.

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Environmental stress and reproductive mode in Mesaphorura macrochaeta (Tullbergiinae, Collembola)

Cited by 25 publications

References 20 publications

Ecotoxicity of mercury to Folsomia candida and Proisotoma minuta (Collembola: Isotomidae) in tropical soils: Baseline for ecological risk assessment

Ecotoxicity of mercury to Folsomia candida and Proisotoma minuta (Collembola: Isotomidae) in tropical soils: Baseline for ecological risk assessment

Disturbances, organisms and ecosystems: a global change perspective

Driving factors and temporal fluctuation of Collembola communities and reproductive mode across forest types and regions

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