Article
Fisheries
Shokoofeh Shamsi, Luke Pearce, Xiaocheng Zhu
Summary: This study investigates the presence of parasites in the southern pygmy perch population and provides insights into their effect on the health and conservation of the species. Nematode larvae belonging to the genus Spiroxys were found in 14 of the examined specimens. The discovery of nematode larvae raises concerns about the potential effects of parasites on the endangered southern pygmy perch population.
MARINE AND FRESHWATER RESEARCH
(2023)
Article
Water Resources
Amimul Ahsan, Sushil K. Das, Md. Habibur Rahman Bejoy Khan, Anne W. M. Ng, Nadhir Al-Ansari, Shakil Ahmed, Monzur Imteaz, Muhammad A. U. R. Tariq, Md. Shafiquzzaman
Summary: Pollution of a watershed by different land uses and agricultural practices is a major challenge that affects water quality, human health, and ecosystems. Sustainable use of water resources requires reducing Non-Point Source (NPS) pollutants through best management practices (BMPs). The use of a hydrologic model like SWAT helps analyze the impact of various BMPs and determine the best combination for water quality improvement.
APPLIED WATER SCIENCE
(2023)
Article
Environmental Sciences
Sushil K. Das, Amimul Ahsan, Md. Habibur Rahman Bejoy Khan, Muhammad Atiq Ur Rehman Tariq, Nitin Muttil, Anne W. M. Ng
Summary: This study evaluates the potential impacts of climate alteration on the hydrology of the Yarra River catchment in Victoria, Australia, using the SWAT model. Future climate projections suggest a decrease in rainfall, an increase in temperature, and significant increases in evapotranspiration and decreases in surface runoff, leading to water shortages within the catchment.
Article
Ecology
Chase H. Smith, Nathan A. Johnson, Clinton R. Robertson, Robert D. Doyle, Charles R. Randklev
Summary: Population genomics has enhanced our ability to study microevolutionary processes and demographic histories, particularly in imperiled species like freshwater mussels. By using genotype-by-sequencing and mitochondrial sequence data, this study identified conservation units for two imperiled freshwater mussel species and analyzed distribution trends, current status, and factors contributing to population declines. Results showed an increasing trend of occurrence in each conservation unit, suggesting rareness of these species and highlighting the importance of evidence-based recovery planning.
ECOLOGY AND EVOLUTION
(2021)
Article
Geosciences, Multidisciplinary
Robert Wasson, Shukla Acharjee, Raghupratim Rakshit
Summary: Sedimentation in the Brahmaputra River has caused channel widening and shallowing, leading to land loss and agricultural deposition. This paper aims to review existing knowledge of sediment sources and processes, and suggests a strategy using geochemical tracers to address the issue.
EARTH-SCIENCE REVIEWS
(2022)
Article
Ecology
Zeb Tonkin, Paul Moloney, Jarod Lyon, Adrian Kitchingman, Justin O'Mahony, Scott Raymond, Graeme Hackett, Steve Saddlier, Andrew Greenfield, David Wood, Robin Hale
Summary: Movement plays a crucial role in animal distribution and ecosystem structure. Habitat loss and fragmentation can hinder movement and lead to population declines. This study examines the movement behavior of Murray cod in a highly modified floodplain ecosystem, finding that movement is influenced by environmental conditions and river flow regulations. Flow management can help restore keystone species habitats and ensure their critical life functions.
Article
Fisheries
Kurtis R. Shollenberger, Alexis M. Janosik, Carol Johnston
Summary: This study investigates the distribution of the snail darter Percina tanasi in the Tennessee River system using environmental DNA analysis. The results show that this species is present in various locations throughout the main stem Tennessee River, which has implications for conservation efforts and further research on population movement and relatedness.
JOURNAL OF FISH BIOLOGY
(2023)
Article
Zoology
Takeshi Kikko, Kazuhiro Sugahara, Yoshitaka Kataoka, Daisuke Ishizaki, Tsuyoshi Yoshioka, Junichi Tsuboi, Kentaro Morita, Masayuki Kuwahara, Kei'ichiro Iguchi, Yoshiaki Kai, Kouji Nakayama
Summary: Genetic analysis reveals that the nagaremon-charr in the Ane River tributary of Japan is an intra-populational specific color variant of white-spotted charr. They share the same mtDNA haplotypes with sympatric normal-charr. The extremely reduced genetic diversity observed in nagaremon-charr specimens above a waterfall suggests the role of genetic drift in the fixation of the nagaremon-morphotype. Conservation efforts should be directed towards both nagaremon-charr and normal-charr in the entire Ane River tributary.
ZOOLOGICAL SCIENCE
(2022)
Article
Biodiversity Conservation
James E. McKenna, Anthony David
Summary: Biodiversity plays a crucial role in ecological processes, and rare species are an important component of biodiversity. Freshwater species are particularly threatened globally, and it is important to evaluate rare freshwater species and their habitats in order to preserve ecological function. In this study, the fish communities of the upper St. Lawrence River and its tributaries were analyzed to determine the distribution of species, habitat conditions, and potential threats.
NORTHEASTERN NATURALIST
(2023)
Article
Environmental Sciences
I. S. Somasiri, Tilak Hewawasam, M. P. Rambukkange
Summary: Soil erosion is a serious issue in highland areas of Sri Lanka dominated by extensive agricultural activities. Effective methods of assessing and monitoring soil erosion rates are crucial for implementing suitable conservation methods to preserve this non-renewable resource. The study compared field-based measurements with modeled erosion rates using GIS/Remote Sensing, highlighting the importance of integrating RUSLE with GIS/RS for soil erosion hazard mapping at the catchment scale.
MODELING EARTH SYSTEMS AND ENVIRONMENT
(2022)
Article
Environmental Sciences
Chris J. Brauer, Jonathan Sandoval-Castillo, Katie Gates, Michael P. Hammer, Peter J. Unmack, Louis Bernatchez, Luciano B. Beheregaray
Summary: Under climate change, species without the ability to shift their range rely on genetic variation for adaptation. Genomic vulnerability studies often overlook hybridization as a source of adaptive variation. This study found that hybrid populations of rainbowfish showed reduced vulnerability to climate change compared to pure narrow endemics, highlighting the importance of hybrid populations and adaptive introgression in the evolutionary rescue of species with narrow environmental ranges.
NATURE CLIMATE CHANGE
(2023)
Editorial Material
Geosciences, Multidisciplinary
R. P. Bourman, C. V. Murray-Wallace, C. Wilson, L. Mosley, J. Tibby, D. D. Ryan, E. D. De Carli, A. Tulley, A. P. Belperio, D. Haynes, A. Roberts, C. Westell, E. J. Barnett, S. Dillenburg, L. B. Beheregaray, P. A. Hesp
AUSTRALIAN JOURNAL OF EARTH SCIENCES
(2023)
Article
Ecology
Katie Gates, Jonathan Sandoval-Castillo, Chris J. Brauer, Peter J. Unmack, Martin Laporte, Louis Bernatchez, Luciano B. Beheregaray
Summary: In order to preserve the diversity of ecological and genetic factors in hotspots like tropical rainforests, it is important to understand the forces behind biodiversity. Through studying an Australian rainbowfish, Melanotaenia splendida splendida, across wet tropical regions, we found that environmental gradients and terrain structure strongly influence genetic and morphological variation. While neutral genetic population structure is mostly affected by limited gene flow, ecological variables are equally effective in explaining overall genetic variation and better at explaining body shape variation. The strongest environmental predictors are hydrological and thermal variables, which are correlated with heritable habitat-associated dimorphism in rainbowfish. Climate-associated genetic variation is significantly associated with morphology, supporting the heritability of shape variation. These results highlight the evolved functional differences among localities and emphasize the importance of hydroclimate in early stages of diversification. It is expected that tropical rainforest endemics will need to undergo significant evolutionary responses to mitigate fitness losses caused by climate change.
Article
Fisheries
A. Bertram, J. Bell, C. J. Brauer, A. Fowler, P. Hamer, J. Sandoval-Castillo, J. Stewart, M. Wellenreuther, L. B. Beheregaray
Summary: In southeastern Australia, population genomic differentiation in snapper is concordant with coastal biogeographic boundaries and related to spawning and recruitment dynamics. The current management boundaries align with genetic breaks at bioregional boundaries or local-scale variation. This study highlights the value of population genomic surveys in uncovering stock boundaries and demographic variation related to spawning and recruitment in species with high dispersal potential, and emphasizes the importance of marine biogeography in shaping population structure in commercially important species.
ICES JOURNAL OF MARINE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Krystina D. Mossop, Alan R. Lemmon, Emily Moriarty Lemmon, Ron Eytan, Mark Adams, Peter J. Unmack, Katie Smith Date, Hernan E. Morales, Michael P. Hammer, Bob B. M. Wong, David G. Chapple
Summary: The progressive aridification of the Australian continent posed challenges for its resident biota. We investigated the evolutionary history and phylogenetic structure of the arid-adapted Chlamydogobius gobies in response to ongoing habitat aridification. Our findings highlight the role of structural connections in generating patterns of connectivity and isolation for species in arid habitats.
MOLECULAR PHYLOGENETICS AND EVOLUTION
(2023)
Article
Environmental Sciences
Karl Moy, Jason Schaffer, Michael P. Hammer, Catherine R. M. Attard, Luciano B. Beheregaray, Richard Duncan, Mark Lintermans, Culum Brown, Peter J. Unmack
Summary: The study explores the threat of translocating species on freshwater fish biodiversity and presents a successful case of conserving Running River rainbowfish. By captive-breeding wild fish and translocating them to unoccupied habitats, two populations of Running River rainbowfish were established, but challenges of predation and release timing remain. This provides valuable insights for similar conservation programs involving short-lived fish species.
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
(2023)
Article
Evolutionary Biology
Eleanor A. L. Pratt, Luciano B. Beheregaray, Pedro Fruet, Gabriela Tezanos-Pinto, Kerstin Bilgmann, Nikki Zanardo, Fernando Diaz-Aguirre, Eduardo R. Secchi, Thales R. O. Freitas, Luciana M. Moller
Summary: Climate change has led to major environmental restructuring in the world's oceans, and marine organisms have responded through genomic adaptation. This study investigates the genomic basis of ecotype formation in bottlenose dolphins in the Southern Hemisphere, revealing subspecies-level genomic divergence and lower genomic diversity in inshore lineages. Genomic regions associated with cardiovascular, musculoskeletal, and energy production systems have undergone repeated adaptive evolution in these lineages, suggesting parallel evolution of inshore bottlenose dolphins. Understanding the adaptive capacity of local species and populations is crucial amidst changing marine ecosystems.
GENOME BIOLOGY AND EVOLUTION
(2023)