Nematode trophic structure in the phytotelma of <i>Neoregelia cruenta</i> (Bromeliaceae) in relation to microenvironmental and climate variables

Almeida, Alexandre Macedo; Souza, Ricardo Moreira

doi:10.21307/jofnem-2020-100

Cited by 3 publications

(8 citation statements)

References 29 publications

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“…Samples were collected in the terrestrial bromeliad Neoregelia cruenta (R. Graham) L. B. Smith, which thrives abundantly in the RJNP, shaded by short trees and shrubs. Only mature plants with inflorescence were sampled because this phenological stage is known to support a more abundant nematode community ( Almeida and Souza, 2020 ).…”

Section: Methodsmentioning

confidence: 99%

“…These studies have shown that in all phytotelmata, bacterial, and hyphal feeder nematodes predominate over plant feeders, unicellular eukaryote feeders and carnivores. Seasonal changes in nematode abundance (total and per trophic group) have been reported in some studies (Ptatscheck and Traunspurger, 2015;Robaina et al, 2015;Zotz and Traunspurger, 2016), but not in others (Ptatscheck and Traunspurger, 2014;Almeida and Souza, 2020).…”

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confidence: 92%

“…Nematodes have been known to inhabit phytotelmata since the 1920s, but only recently have ecologists investigated them in tree holes ( Devetter, 2004 ), plastic cups mimicking tree holes ( Ptatscheck and Traunspurger, 2014, 2015 ; Ptatscheck et al, 2015 ), and bromeliads ( Robaina et al, 2015 ; Zotz and Traunspurger, 2016 ; Almeida and Souza, 2020 ). These studies have shown that in all phytotelmata, bacterial, and hyphal feeder nematodes predominate over plant feeders, unicellular eukaryote feeders and carnivores.…”

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confidence: 99%

“…The amount of organic debris impounded in the phytotelma and the biomass of algae living in the phytotelma water correlate positively with nematode abundance and diversity. Fluctuations in rainfall do not impact the nematodes, while the mean air temperature may affect nematodes in temperate regions, but not in tropical ones (Almeida and Souza, 2020;Ptatscheck and Traunspurger, 2015).…”

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confidence: 99%

“…Indeed, these water PCPs have been found to impact communities of algae, archaea, bacteria, micro-and macroinvertebrates (Goffredi et al, 2011;Marino et al, 2011Marino et al, , 2013Carrias et al, 2012Carrias et al, , 2014Gossner et al, 2016;Louca et al, 2016Louca et al, , 2017. Nonetheless, in nature reserves in Germany and Brazil, the water PCPs had no impact on nematode abundance, except for the positive correlation between the amount of dissolved oxygen and the abundance of hyphal feeder nematodes (Almeida and Souza, 2020;Traunspurger, 2014, 2015).…”

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In bromeliad phytotelma, anthropic disturbance does not affect the nematode trophic structure

Almeida

Filho

Souza

2020

Journal of Nematology

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Phytotelmata (sing. phytotelma) are plant-associated reservoirs of rainwater and organic debris. These freshwater ecosystems are found in tree and bamboo holes, pitcher plants, and tank-forming bromeliads. Some studies suggest that anthropic disturbance (AD) may change the physico-chemical properties (PCPs) of the water retained in the phytotelma, and indirectly impact its biota. Hence, new AD-bioindicators could be found in the phytotelma biota. To test this hypothesis, three areas of Atlantic Forest were selected, distinct only by the level of long-term AD. In these areas, we monitored the nematode trophic structure and the water PCPs in the bromeliad Neoregelia cruenta during two years (eight seasons). Significant differences among areas were found in some seasons for total nematode abundance and/or the abundance of some trophic groups, but no pattern emerged relative to the level of AD. Anthropic disturbance did not impact nematode trophic structure possibly because the water PCPs remained fairly similar in all three areas. Our results do not corroborate previous reports that AD alters phytotelma water. On the other hand, our findings support previous studies suggesting that nematodes inhabiting bromeliad phytotelma are not good candidates for AD-bioindicators.

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Section: Methodsmentioning

confidence: 99%

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confidence: 92%

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confidence: 99%

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confidence: 99%

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confidence: 99%

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In bromeliad phytotelma, anthropic disturbance does not affect the nematode trophic structure

Almeida

Filho

Souza

2020

Journal of Nematology

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Bromeliad phytotelmata: the first scientometric study

Filho¹,

Mantovano²,

Perbiche‐Neves³

et al. 2023

Limnetica

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Some representatives of this family have the ability to form phytotelma environments through the accumulation of water and organic matter, serving as substrate and food for a variety of organisms. Here, a scientometric analysis was carried out to show trends in scientific work on bromeliad phytotelmata and the importance of these microcosms for the maintenance of biodiver¬sity. The papers were analyzed using the Thomson Reuters, Scopus and Scielo databases between the years 1970 and 2021. Information was sought on the years of publications, geographic regions, countries, article design (descriptive, predictive, ex¬perimental, review), focus (ecological, biological, molecular), and ecological level of study (organism, population, community and ecosystem). South America presented the highest number of works developed with the subject and also with researchers involved. Most studies presented predictive designs focusing on community ecology. Insecta, followed by Crustacea and Anu¬ra, were the most studied groups of organisms. The results contribute to a better understanding of biodiversity in bromeliad phytotelmata, pointing out gaps and trends in research directed at these natural microcosms.

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Fundamental questions in meiofauna—how small but ubiquitous animals can help to better understand Nature

Martínez García,

Bonaglia,

Di Domenico

et al. 2023

Preprint

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Meiofauna—a collective term to define microscopic animals—represent a numerically important component of biodiversity in most of Earth’s ecosystems and play a crucial role in biogeochemical cycles. Meiofauna have also been used as models to understand fundamental adaptive processes, have contributed to a better understanding of the animal’s Tree of Life, and are believed to be a treasure trove for future genomic studies. To celebrate the diversity of research topics brought to us by the term “meiofauna”, we gathered a multidisciplinary team of 42 ecologists, taxonomists, morphologists, biogeographers, molecular biologists, and scientific disseminators to list 194 fundamental questions in meiofaunal research. Then, through an online survey, 251 scientists, administrators, students, and stakeholders assisted us in reducing this list to 50 top-priority questions. Applied topics related to anthropogenic impact and climate change received the highest scores, whereas questions related to areas in development such as genomics or adaptations, received less attention. Whereas we might not be exploiting meiofauna’s full potential yet, more and more integrative approaches and technological developments will create opportunities to employ these fascinating organisms to answer broad and important questions, despite of their impediments related to their small body size. Meiofauna research agenda should balance amongst investigating general questions, addressing more specialized research topics, and generating primary data on distribution, taxonomy, traits, and DNA sequences. The geographical and taxonomic biases that have historically affected meiofaunal research can be alleviated by promoting international cooperation, open data sharing, and an increase effort in education, taxonomic training, as well as scientific communication. We hope that this will get both researchers and the general public intrigued by those small critters that constantly lurk unseen in front of us.

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Nematode trophic structure in the phytotelma of Neoregelia cruenta (Bromeliaceae) in relation to microenvironmental and climate variables

Cited by 3 publications

References 29 publications

In bromeliad phytotelma, anthropic disturbance does not affect the nematode trophic structure

In bromeliad phytotelma, anthropic disturbance does not affect the nematode trophic structure

Bromeliad phytotelmata: the first scientometric study

Fundamental questions in meiofauna—how small but ubiquitous animals can help to better understand Nature

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