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Effective spatial management plans for seamount ecosystems necessitate an understanding of distribution patterns and key environmental factors influencing benthic communities. However, knowledge regarding deep\u2010sea biodiversity patterns over intricate topography remains limited. In this study, we investigated a seamount with a water depth of 522\u2009m at the summit located in the southern section of KPR. Survey transects were conducted from 522\u2009m to 4059\u2009m. By analyzing video\u2010recorded data obtained by a human\u2010occupied vehicle (HOV) during dives and environmental variables derived from bathymetry, distinct assemblages were identified through noise clustering. \u03b1\u2010 and \u03b2\u2010diversity patterns within the seamount megabenthic community were analyzed across the depth gradient, along with investigation of their environmental drivers. A total of 10,596 megafauna individuals were documented, categorized into 88 morphospecies and statistically separated into six distinct community clusters using noise clustering analysis. Species abundance and richness were highest within the 700\u2013800\u2009m water depth range, declining notably beyond 2100\u2009m, indicating a critical threshold for habitat classification in this region. The \u03b2\u2010diversity of megabenthic communities was high (0.836). Although \u03b2\u2010diversity patterns along the depth gradient were mostly dominated by differences in species richness, the contribution of species replacement increased with depth, becoming dominant at depths greater than 3000\u2009m. Depth emerged as the primary driver of spatial variation in community structure, while near\u2010bottom current velocity, topographic parameters (bathymetric position index, slope), and substrate type also influenced the formation of microhabitats. The study highlights the depth gradients, thresholds, and other intricate environmental factors shaping the spatial heterogeneity of these communities. It provides valuable insights for the future development of effective survey and conservation strategies for benthic biodiversity on the KPR.<\/jats:p>","DOI":"10.1002\/ece3.70427","type":"journal-article","created":{"date-parts":[[2024,10,18]],"date-time":"2024-10-18T04:01:42Z","timestamp":1729224102000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Megabenthic Diversity Patterns on a Seamount in the Philippine Sea: Implications for Conservation Planning on the Kyushu\u2010Palau Ridge"],"prefix":"10.1002","volume":"14","author":[{"given":"Xun","family":"Lu","sequence":"first","affiliation":[{"name":"Key Laboratory of Marine Ecosystem Dynamics, Second Institute of Oceanography, Ministry of Natural Resources  Hangzhou P. R. 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