# Rising Sea Levels Threaten Over 40% of Global Land Vertebrate Habitats New research indicates coastal inundation will impact thousands of species by the year 2100. - **Source:** [Mongabay](https://news.mongabay.com) - **Published:** 2026-11-11 - **Topic:** [science](https://brifing.si/c/science) - **Original article:** - **On Brifing:** https://brifing.si/s/e441aff7-a4a0-49cc-a65e-5d824c8e8c7d ## Massive Habitat Loss Projected Climate-driven sea level rise threatens to submerge parts of the habitats for over 42% of terrestrial vertebrates by 2100. Researchers analyzed 34,120 species, representing 90% of known amphibians, reptiles, birds, and mammals. This study highlights a critical gap between current conservation planning and future geographical realities of coastal ecosystems. ## Scale of Species Impact Depending on specific climate emission scenarios, between 14,325 and 15,324 species face potential habitat loss due to coastal flooding. While these numbers are substantial, only 5.9% of these affected species are currently listed as at risk from climate change in official IUCN Red List assessments, suggesting an urgent need for reassessment. ## Vulnerability Across Taxonomic Groups The study reveals distinct impacts across animal classes: up to 63% of birds, 52% of mammals, 36% of reptiles, and 24% of amphibians face habitat reduction. Reptiles appear particularly vulnerable, likely experiencing nearly double the amount of habitat loss compared to birds or mammals, especially those with narrow geographical ranges or existing threats. ## Accelerating Sea Level Trends The current rate of sea level rise exceeds 4 millimeters per year, a figure that has more than doubled since the 1993–2002 period. Scientists estimate this rate could climb to 10 millimeters annually in the near future, significantly increasing the speed at which coastal and island habitats are permanently lost to ocean waters. ## Methodology and Climate Scenarios Researchers overlaid habitat suitability maps with five distinct climate change scenarios ranging from low to high emission outlooks. By comparing these projections, the team identified which specific areas remain above water. This approach emphasizes that conservation strategies must prioritize future land availability rather than relying solely on current species distribution data. ## Conservation Planning Challenges Zhong-Wen Jiang, a co-author from Sun Yat-sen University, stresses that conservation planning must evolve. Experts need to look beyond where species occur today and actively identify which habitat segments will remain viable in the future. This shift is essential to prevent mass displacement as coastal inundation alters global biodiversity landscapes. ## Human and Ecological Overlap The inundation of coastlines and islands does not affect wildlife in isolation. These environmental changes threaten human and animal habitats alike, creating complex pressures on coastal zones. As sea levels rise, the competition for remaining dry land may intensify, further complicating the survival prospects for species already struggling with environmental degradation. ## Future Outlook and Implications The findings underscore a significant oversight in current biodiversity protection efforts regarding coastal inundation. With thousands of species facing habitat reduction, the scientific community must integrate sea level projections into long-term survival strategies. Monitoring these vulnerable regions is now a priority to mitigate the irreversible loss of global vertebrate diversity. ## Sources covering this story - [Mongabay — Rising Seas Threaten Habitats of Over 40% of Land Vertebrates](https://news.mongabay.com/2026/11/rising-seas-could-reshape-habitats-for-more-than-40-of-worlds-land-vertebrates/) - [Phys.org – Earth — Rising Sea Levels Threaten 15,000 Land Vertebrate Species by 2100](https://phys.org/news/2026-11-vertebrate-species-habitat-sea.html) --- _Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._