Historical baselines revealed directional tendencies in environmental niche dynamics and constrained habitat tracking in depleted large yellow croaker
Description
We combined occurrence records from 1971–1982 and 2005–2024 with PCA-environment analyses and species distribution models to evaluate temporal changes in the environmental niche and habitat of large yellow croaker (Larimichthys crocea) in the East China Sea during overwintering period.
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Species occurrence data for large yellow croaker (Larimichthys crocea) were compiled for historical and contemporary periods. Historical occurrence records were primarily derived from commercial fishery records, whereas contemporary records were mainly obtained from fishery-independent scientific surveys in the East China Sea. Additional occurrence records were compiled from publicly available biodiversity databases, including the Global Biodiversity Information Facility (GBIF) and the Ocean Biodiversity Information System (OBIS), as well as published literature. All occurrence records were checked, cleaned, and standardized to a common 0.5° spatial grid before analysis. Environmental variables were obtained from the Community Earth System Model version 2 (CESM2) of CMIP6. Sea surface temperature, sea surface salinity, and chlorophyll-a data were extracted for the corresponding historical and contemporary periods and processed to match the spatial extent and resolution of the species occurrence data. Bathymetric data were obtained from the General Bathymetric Chart of the Oceans (GEBCO), and the study domain was restricted to continental-shelf waters shallower than 200 m. Fishing-effort data were obtained from Global Fishing Watch. Fishing hours were extracted by gear type and spatial location, and demersal fishing effort during winter 2022–2024 was aggregated to a 0.5° grid to match the species distribution model outputs. The processed occurrence, environmental, bathymetric, and fishing-effort datasets provided in this repository correspond to the data used for PCA-environment analyses, species distribution modelling, habitat-shift analyses, and fishing-exposure assessment described in the associated manuscript. Detailed analytical procedures and model settings are provided in the Materials and Methods section of the manuscript.
Institutions
- The University of TokyoTokyo, Tokyo