Faunal and Ecological Analysis of Gamasid Mites (Acari: Mesostigmata) Associated with Small Mammals in Yunnan Province, Southwest China

Insects, Journal Year: 2025, Volume and Issue: 16(3), P. 305 - 305

Published: March 15, 2025

Gamasid mites (Acari: Mesostigmata) are ecologically diverse arthropods, many of which act as vectors for zoonotic diseases such rickettsial pox and hemorrhagic fever with renal syndrome. This study investigates the faunal ecological patterns gamasid across five zoogeographic microregions in Yunnan Province, China, a biodiversity hotspot complex topography. From 1990 to 2022, 18,063 small mammal hosts (primarily rodents) were surveyed, yielding 167 mite species (141,501 specimens). The key findings include following: (1) Low host specificity: most parasitized >10 species, Laelaps nuttalli, L. echidninus, Dipolaelaps anourosorecis, guizhouensis, turkestanicus, chini dominating (>76.59% abundance). (2) Environmental heterogeneity: mountainous outdoor habitats exhibited higher diversity than flatland/indoor environments. (3) Zoonotic risks: thirteen vector low specificity identified, potentially amplifying disease transmission. (4) Ecological niche dynamics: high overlaps (e.g., guizhouensis vs. xingyiensis: Oik = 0.997) positive interspecific correlations echidninus nuttalli: R 0.97, p < 0.01) suggest co-occurrence trends on shared hosts. (5) Biogeographic patterns: communities clustered distinctly by microregion, highest similarity being obtained between western/southern plateaus (IV V) unique Hengduan Mountains (I). (6) Chao 1 estimation predicted 203 total Yunnan, 36 undetected current sampling. These results highlight interplay biogeography, ecology, environmental factors shaping distributions, implications surveillance biodiverse regions.

Language: Английский

Land-use monitoring of tree-crop diversification in eastern Côte d’Ivoire: Landscape structure changes and implications for sustainable landscape development

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: May 15, 2025

Tree-crop diversification is increasingly adopted in tropical agricultural landscapes as a resilience strategy amidst fluctuating commodity markets, environmental change, and policy shifts. However, its spatial implications at the landscape level remain underexplored. This study examines structure dynamics of mosaic eastern Côte d’Ivoire, region characterized by heterogeneous landscapes, response to tree-crop trends their for sustainable management. Using multi-temporal Landsat imagery (1986, 2016, 2023), remote sensing classification with Random Forest algorithm, metrics, we evaluated changes land-use/land-cover (LULC), composition (diversity, regularity), configurational heterogeneity (complexity fragmentation). Results reveal substantial increase rubber plantations (net gain 50.35%), concurrent declines cropland (−147%), cocoa (−45.28%), sparse vegetation (−61.48%). Although diversity increased slightly (Shannon index: 0.99 1.07), fragmentation intensified, mean patch size decreasing 12.3%. While introduced new compositional complexity, it often manifested monoculture expansion rather than ecologically restorative land-use. The resulting structural transformations, high edge densities smaller, isolated patches, suggest diminished functional connectivity natural habitats increasing ecological vulnerability. These raise critical questions about long-term sustainability current land-use trajectories. We argue that diversification, while enhancing economic stability, can erode without integrated landscape-level planning intervention. recommend landscape-scale strategies promote agroecological corridor conservation, inclusive governance mitigate maintain multifunctionality these rapidly transforming landscapes.

Language: Английский

Evolution of the ecological security pattern of the Yellow River Basin based on ecosystem services: a case study of the Shanxi section, China

Frontiers in Environmental Science, Journal Year: 2024, Volume and Issue: 12

Published: Oct. 25, 2024

Identifying and evaluating the ecological security pattern (ESP) of region can provide a solid foundation for optimizing regional ecosystem elements improving security. The PLUS model, InVEST circuit theory were used to analyze services ESP Shanxi section Yellow River Basin (SYRB) between 2005 2035. findings revealed that 1) total area land use shift across categories 2020 was 6,080.99 km 2 , or 5.22% SYRB’s area. Under natural development scenario, transfer from 2035 predicted be 4,605.10 . Among these, tendency construction forest expanding, while cultivated land, grassland, water area, unused shrinking; 2) From 2035, yield soil conservation all decreased, habitat quality carbon storage showed declining tendency; 3) source increased 35,767.00 in 39,931.00 2035; length corridors expanded 2,792.24 3,553.18 pinch points 27 40 barrier 21 28 which show remained unstable; 4) According service characteristics SYRB 2020, an “one axis, two zones, four corridors, multiple points” constructed. This study could useful guidance spatial maintaining services.

Language: Английский