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Rapid Monitoring of the Abundance and Spread of Exotic Annual Grasses in the Western United States Using Remote Sensing and Machine Learning

التفاصيل البيبلوغرافية
العنوان: Rapid Monitoring of the Abundance and Spread of Exotic Annual Grasses in the Western United States Using Remote Sensing and Machine Learning
المؤلفون: Neal J. Pastick, Bruce K. Wylie, Matthew B. Rigge, Devendra Dahal, Stephen P. Boyte, Matthew O. Jones, Brady W. Allred, Sujan Parajuli, Zhuoting Wu
المصدر: AGU Advances, Vol 2, Iss 2, Pp n/a-n/a (2021)
بيانات النشر: Wiley, 2021.
سنة النشر: 2021
المجموعة: LCC:Geology
LCC:Geophysics. Cosmic physics
مصطلحات موضوعية: exotic annual grasses, fuel breaks, machine learning, meta‐learning systems, wildfires, sage‐grouse habitat, Geology, QE1-996.5, Geophysics. Cosmic physics, QC801-809
الوصف: Abstract Exotic annual grasses (EAG) are one of the most damaging agents of change in western North America. Despite known socio‐environmental effects of EAG there remains a need to enhance monitoring capabilities for better informing conservation and management practices. Here, we integrate field observations, remote sensing and climate data with machine‐learning techniques to estimate and assess patterns of historical (1985–2019; R2 = 0.86 ± 0.05; MAE = 6.7 ± 1.4%), present (2020), and future (2025–2040) EAG abundance (30‐m) across much of the western United States. Trend analysis revealed that ∼8% and 1% of the landscape experienced significant rises and declines in historical EAG cover, respectively, with hotspots of invasion generally occurring near roads and along low‐to‐mid elevation gradients with warmer and drier conditions. Accurate simulations of the response of EAG to changing environmental conditions, disturbances and management treatments indicate that ecosystem resistance to invasion is largely controlled by long‐term EAG abundance (surrogate for seed bank), time since and frequency of wildfire, and plant community interactions. Ecological thresholds associated with enhanced probabilities of wildfire occurrence and invasion rates indicate that relatively little (10%) EAG cover is needed to heighten these risks. Climate change is expected to push 8% of the landscape across invasion thresholds by 2040, impacting 6% of existing sage‐grouse habitat, and we identify where fuel breaks may be placed to reduce wildfire risks and invasion. Spatially detailed, timely, and accurate depictions of past, present, and future EAG abundance are vital for the protection of life and property and the continued stewardship of sagebrush ecosystems.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2576-604X
Relation: https://doaj.org/toc/2576-604X
DOI: 10.1029/2020AV000298
URL الوصول: https://doaj.org/article/9fbcdd52f5494ca4a279aae0481e67c9
رقم الأكسشن: edsdoj.9fbcdd52f5494ca4a279aae0481e67c9
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:2576604X
DOI:10.1029/2020AV000298