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Isotopic variability of the invasive blue crab Callinectes sapidus in the Gulf of Cadiz: Impacts and implications for coastal ecosystem management.
J Environ Manage
January 2025
Department of Ecology and Coastal Management, Instituto de Ciencias Marinas de Andalucía (ICMAN-CSIC), Avda. República Saharaui, 2, Puerto Real, Cadiz, 11510, Spain; Associate Research Unit "Blue Growth", Spanish National Research Council (CSIC) - Andalusian Institute of Agricultural and Fisheries Research and Training (IFAPA), Cadiz, Spain. Electronic address:
The variability in trophic position and carbon isotopic signatures can provide information about their dietary flexibility and its ability to adapt to changing environmental conditions. The impact of the invasive blue crab Callinectes sapidus was assessed by estimating its trophic position and isotopic niche using stable isotopes (δ³C, δ⁵N, δ³⁴S) across different invaded Atlantic coastal areas. This study, the first of its kind in the eastern Atlantic range, reveals the crab's omnivorous behavior with a wide trophic position (TP = 2-4), consistent with findings from its native range.
View Article and Find Full Text PDFSeasonal agricultural activities and monsoon shifts drive fluctuations in nitrogen levels in eutrophic coastal waters: A case study of Xiangshan Bay, China.
Mar Pollut Bull
January 2025
Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310012, China.
Xiangshan Bay, one of China's most eutrophic semi-enclosed bays, was studied to examine the seasonal distributions of salinity, temperature, nutrients, and nitrate isotopes (δN and δO) to elucidate seasonal variations in nitrate sources and the key factors driving nitrogen level fluctuations. Based on nitrate δN (6.1-8.
View Article and Find Full Text PDFLong-term monitoring of total suspended matter concentration in fishponds in the Guangdong-Hong Kong-Macao Greater Bay Area.
Environ Monit Assess
January 2025
Department of Geography, The University of Hong Kong, Pokfulam Road, Hong Kong, 999077, China.
Excessive total suspended matter (TSM) concentrations can exert a considerable impact on the growth of aquatic organisms in fishponds, representing a significant risk to aquaculture health. This study revised existing unified models using empirical data to develop an optimized TSM retrieval model tailored for the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) (R = 0.69, RMSE = 7.
View Article and Find Full Text PDFPlastics reset in an adult Procellariform seabird species during the breeding season.
Mar Environ Res
December 2024
Instituto de Investigação em Ciências do Mar - OKEANOS, Universidade dos Açores, HORTA, 9900-138, Portugal.
Plastic ingestion has been extensively studied in seabirds. However, knowledge gaps remain in understanding how plastic loads behave over time and their residence inside Procellariforms. This study investigated the temporal dynamics of ingested plastics by adult Cory's shearwaters (Calonectris borealis) during the breeding season to shed light on plastic retention times.
View Article and Find Full Text PDFAssessment of temporal aggregation of Sentinel-2 images on seasonal land cover mapping and its impact on landscape metrics.
Environ Monit Assess
January 2025
Universidad Nacional de Córdoba - Facultad de Ciencias Agropecuarias, X5000HUA, Córdoba, Argentina.
Landscape metrics (LM) play a crucial role in fields such as urban planning, ecology, and environmental research, providing insights into the ecological and functional dynamics of ecosystems. However, in dynamic systems, generating thematic maps for LM analysis poses challenges due to the substantial data volume required and issues such as cloud cover interruptions. The aim of this study was to compare the accuracy of land cover maps produced by three temporal aggregation methods: median reflectance, maximum normalised difference vegetation index (NDVI), and a two-date image stack using Sentinel-2 (S2) and then to analyse their implications for LM calculation.
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