华南沿海卵叶喜盐草生物量差异及其关键影响因素

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中图分类号：Q948 文献标识码：A 文章编号：1000-3142（2025）09-1578-14

Differences in biomass of Halophila ovalis and their key environmental factors along the South China coast

LIU Feiwu 1，2 ， DAI Hongtao³， GUO Yuming³，PAN Yuanfang 2，4 ，WU Liguang³， HUANG Liangliang'， QIU Guanglong 2，4 *

（1.GuangxiKeyLboatoyfoetalonControloTcoloholfoetalSiencendin，

GuilinUniversityofchnology，Guilin4，Guangxi，China；2GuangxiKeyLboratoryofangroveConserationndUlization GuangxiAcademyofMarine Sciences（Guangxi MangroveResearch Center），Beihai536ooo，Guangxi，China；3.HepuDugong National Nature Reserve Management Center， Guangxi Zhuang Autonomous Region， Beihai 536100， Guangxi，China；4.Observationand Research StationofCoastal Wetland Ecosystem in Beibu Gulf，Ministry ofNatural Resources，Beihai 5360l5，Guangxi，China）

Abstract：Toinvestigate therelationshipbetweenbiomassvariationinHalophilaovalisand itsenvironmental factors， this study systematically analyzed response relationship of H .ovalis biomass to multiple environmental factors using literature data （1990-2025 ）from the South China coast. Structural equation modeling（SEM）and linear mixedefcts model（LMM）were employed to quantify directand indirect factors，such as water temperature，salinity， nutrients，suspended solids，and pH onbiomass.The results were as follows：（1）Suspended solids in water significantly inhibited biomass accumulation and represented a widespread limiting factor acrossthe region.（2）Water temperature，salinity，andnutrients[including disolved inorganic nitrogen（DIN）andreactive phosphate in water （ PO43- ）availability]were key environmental factors leading to biomass diferences.（3）Nitrogen and phosphorus nutrients，particularly ammonium nitrogen（ NH4+ -N），imposed critical constraints on biomass accumulation in each province （region），but dominantfactors variedregionall.This study emphasizes thatinthe future，itisnecessary to pay atentiontotheinteraction efectsof multi-scale environmental factorsand formulateregional adaptiveprotection strategies basedonenvironmental threshold management.Theresultsof thisstudyprovide a scientificbasis forthe protection and restoration of the seagrass bed of H ovalis.

Key Words：linear mixed-effctsmodel（LMM），structural equation modeling（SEM），Halophilaovalis，biomass，environmental factors

海草床是全球沿海重要的生态系统之一，广泛分布于全球温带至热带海岸，具有极高的生态系统服务价值，包括提供动物栖息地和育幼场所、净化水质、固定泥沙、参与营养循环和碳储存等功能（郑凤英等，2013；周毅等，2023；Duarteetal.，2025）。（剩余28048字）