Article
Marine & Freshwater Biology
G. C. Z. Reinas, J. C. Silva, A. Bialetzki
Summary: This study analyzed the diet and distribution of native and exotic Loricariidae fish from a Neotropical floodplain and found that these factors contribute to the coexistence of different species. Differences in diet and resource utilization promote coexistence, but the large population size of exotic species may pose a competitive threat to native species.
Article
Biodiversity Conservation
Cristhiana Ropke, Tiago H. S. Pires, Nagila Zuchi, Jansen Zuanon, Sidineia Amadio
Summary: Abnormal hydroclimatic events in the Amazon have been found to impact fish reproduction and demographic parameters, leading to a decrease in the proportion of mature females and a reduction in the average body size of ripe females. These effects are observed in both fished and non-fished species, highlighting the need for conservation policies to address the impact of droughts and fishing pressure.
JOURNAL OF APPLIED ECOLOGY
(2022)
Article
Ecology
Mollie H. Ogaz, Andrew L. Rypel, Robert A. Lusardi, Peter B. Moyle, Carson A. Jeffres
Summary: Floodplains provide important habitat for native fishes, but stranding can be a potential negative outcome in restored ecosystems. Understanding the outmigration cues of native and non-native fishes can potentially help to rehabilitate degraded river ecosystems and benefit native fishes.
Article
Biodiversity Conservation
Joisiane Mendes Araujo, Sandra Bibiana Correa, Jerry Penha, Jill Anderson, Anna Traveset
Summary: The study evaluated the impact of reductions in abundance and species richness of large frugivorous fishes on their interactions with plants in a Neotropical floodplain, predicting potential cascading effects on plant diversity and ecosystem-level changes. The functional extinctions of fish mutualists can lead to secondary extinctions of plants and their biotic associates. The networks showed reduced robustness to extinction of large frugivorous fish, highlighting the importance of sustainable management in protecting interactions and maintaining biodiversity in wetland forests.
JOURNAL OF APPLIED ECOLOGY
(2021)
Article
Environmental Sciences
Thais de Castro Paiva, Eurizangela Pereira Dary, Inacio Abreu Pestana, Sidineia Aparecida Amadio, Olaf Malm, Daniele Kasper
Summary: This study finds that the bioaccumulation of mercury in fishes from an Amazonian lake is influenced by biological characteristics and environmental changes. Feeding habits and seasonal flood-pulse have a significant impact on mercury concentrations in fish muscles.
ENVIRONMENTAL RESEARCH
(2022)
Article
Multidisciplinary Sciences
Margaret S. Nardelli, Denise C. Bicudo, Silvio C. Sampaio, Claudia M. d. S. Cordovil
Summary: The study evaluated diatom abundance in surface sediment from three Pantanal lakes, finding that diatoms were more abundant in mesotrophic conditions but had higher species richness in oligotrophic conditions. The N:P ratio affects diatom abundance, with nitrogen and phosphorus nutrients potentially playing a role as pollutants in the environment.
Article
Ecology
Cristhiana Ropke, Tiago H. S. Pires, Jansen Zuanon, Carlos E. C. Freitas, Marina C. Hernandes, Flavia Souza, Sidineia Amadio
Summary: Understanding the factors that regulate temporal changes in population size is crucial in ecology for maintaining species interactions, ecosystem stability, and biodiversity conservation. This study examined the population stability of 70 Amazonian floodplain fish species in relation to life-history traits and fishing pressure, finding significant relationships with certain life-history traits but not with fishing pressure. The findings stress the importance of life-history traits in controlling population size variation and can inform fisheries and conservation management strategies.
FRESHWATER BIOLOGY
(2021)
Article
Ecology
Ericka O. C. Coni, David J. Booth, Camilo M. Ferreira, Ivan Nagelkerken
Summary: In response to human-mediated ocean warming, coral-reef fishes are shifting poleward and modifying their behavioral niches. Tropical fishes in novel temperate ranges are adjusting their behavior and increasing niche breadth, while native temperate species are also modifying their niches towards subtropical ranges. Behaviors related to feeding and shoaling play a significant role in niche modifications for both tropical and temperate species.
JOURNAL OF ANIMAL ECOLOGY
(2022)
Article
Environmental Sciences
Edelin Jean Milien, Gustavo Manzon Nunes, Girard Pierre, Stephen K. Hamilton, Catia Nunes Da Cunha
Summary: This study analyzes optical imagery from the Sentinel-2 satellite to determine the extent and seasonal patterns of inundation over five years in the northern Pantanal. The results show that the total extent of flooding was underestimated by the optical imagery, but open water bodies were readily delineated with the land cover classification.
Article
Ecology
Junpeng Bai, Huan Zhang, Hongkang Zhou, Shu Li, Bin Gao, Peng Chen, Long Ma, Zhifeng Xu, Zhen Zhang, Changxin Xu, Luzhang Ruan, Gang Ge
Summary: This study examines the ecological niche segregation and habitat use of herbivorous waterbirds to reveal the coexistence mechanism at Poyang Lake during winter. The decline in water levels provides food and habitats for waterbirds, aiding in alleviating interspecific competition.
ECOLOGY AND EVOLUTION
(2021)
Article
Ecology
Anna M. Sturrock, Mollie Ogaz, Kelly Neal, Nicholas J. Corline, Ryan Peek, Dana Myers, Sierra Schluep, Marissa Levinson, Rachel C. Johnson, Carson A. Jeffres
Summary: Cross-boundary subsidies provide important growth opportunities for different taxa. In modified river systems, flood bypasses serve as ephemeral hotspots for zooplankton production, but the extent of downstream transport of these prey items is unclear. The study found that floodplain-produced cladocerans provide temporary food pulses for juvenile salmon. Salmon had fuller stomachs in wetter years and emptier stomachs during drought years. These findings highlight the importance of maintaining diverse, interconnected habitats to support resilient fish populations and maximize prey production and delivery potential.
Review
Oceanography
Elena Eriksen, Hein Rune Skjoldal, Andrey V. Dolgov, Espen Strand, Felicia Keulder-Stenevik, Irina P. Prokopchuk, Tatiana A. Prokhorova, Dmitry Prozorkevich, Aleksander N. Benzik
Summary: The study found that the trophic structure of fish communities in the Barents Sea shows some variations in both spatial and seasonal aspects. However, the main groups of piscivores, planktivores, and benthivores remain consistent across seasons. Planktivores, especially, show clear signs of seasonality as they rely on the 'pulse' of new generations of zooplankton, such as Calanus finmarchicus, developing in spring and summer.
PROGRESS IN OCEANOGRAPHY
(2021)
Article
Marine & Freshwater Biology
Gaspar Gonzalez-Sanson, Consuelo Maria Aguilar-Betancourt, Juan Ramon Flores-Ortega, Luisa Elena Velasco-Reyes, Sandra Carolina Padilla-Gutierrez, Brenda Daniela Benitez-Mondragon
Summary: The main goal of this study was to analyze the feeding habits of species using the same food source in a coastal lagoon. The existence of a homogenous functional group of fish species consuming invertebrates and small fishes was found to be unrealistic. Differences in diet composition were related to differences in species morphology. Factors such as ontogenic change, abundance of fish species, and availability of food resources played a role in the sharing of food resources.
ESTUARINE COASTAL AND SHELF SCIENCE
(2022)
Article
Environmental Sciences
Rubia Fantin da Cruz, Stephen K. Hamilton, Hans M. Tritico, Ibraim Fantin-Cruz, Daniela Maimoni de Figueiredo, Peter Zeilhofer
Summary: This study compares the impacts on water quality of conventional SHPs and SHPs with diversion designs, finding that conventional SHPs have more significant negative effects on water quality compared to smaller SHPs with diversion designs. In the lower reaches of the Sao Lourenco River in Brazil, smaller SHPs showed less pronounced water quality changes. Additionally, the analysis suggests that SHPs on smaller tributaries have fewer impacts on water quality compared to conventional SHPs.
RIVER RESEARCH AND APPLICATIONS
(2021)
Article
Environmental Sciences
Giliane G. Rasbold, Michael M. McGlue, Jose C. Stevaux, Mauro Parolin, Aguinaldo Silva, Ivan Bergier
Summary: The study suggests that enhanced carbon burial occurred in floodplain lakes around the Upper Paraguay River during the mid-Holocene, when lake levels declined under relatively dry climate conditions, increasing littoral area at the expense of open water and capturing floating macrophyte islands. This sheds new light on hydroclimate controls on carbon cycling in the Pantanal wetlands and improves interpretations of geochemical measures on bulk organic matter in floodplain lake cores.
JOURNAL OF PALEOLIMNOLOGY
(2021)