Effects of watershed land use on coastal marine environments: A multiscale exploratory analysis with multiple biogeochemical indicators in fringing coral reefs of Okinawa Island

被引：8

作者：

Sakamaki, Takashi ^{[1
,2
]}

Morita, Akiko ^{[1
,2
,3
]}

Touyama, Shouji ^{[2
,4
]}

Watanabe, Yasushi ^{[5
]}

Suzuki, Shouhei ^{[2
]}

Kawai, Takashi ^{[2
,6
]}

机构：

[1] Tohoku Univ, Dept Civil & Environm Engn, Sendai 9808579, Japan

[2] Univ Ryukyus, Dept Civil Engn & Architecture, Okinawa 9030213, Japan

[3] Oriental Consultants Co Ltd, Tokyo 1510071, Japan

[4] Stargate Entertainment, Okinawa 9050005, Japan

[5] GIS Okinawa Lab, Okinawa 9010401, Japan

[6] Tokyo Kyuei Co Ltd, Tokyo 1010032, Japan

来源：

MARINE POLLUTION BULLETIN | 2022年 / 183卷

关键词：

Land -sea connection; Multiscale buffers; Primary production; Anthropogenic nitrogen; Stable isotopes; Coral reef conservation; ESTUARINE TIDAL FLAT; GREAT-BARRIER-REEF; ECOSYSTEM STRUCTURE; NITROGEN-SOURCES; STABLE-ISOTOPES; ORGANIC-MATTER; FOOD WEBS; QUALITY; CARBON; EUTROPHICATION;

D O I：

10.1016/j.marpolbul.2022.114054

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The analytical spatial scale and selection of biogeochemical indicators affect interpretations of land-use impacts on coastal marine environments. In this study, nine biogeochemical indicators were sampled from 36 locations of coral reefs fringing a subtropical island, and their relationships with watershed land use were assessed by spatial autoregressive models with spatial weight matrixes based on distance thresholds of a few to 30 km. POM-relevant indicators were associated with agricultural and urban lands of watersheds within relatively small ranges (6-14 km), while the concentrations of inorganic nutrients were associated with watersheds within 20 km or more. The macroalgal delta N-15 showed a strong relationship with agricultural lands of watersheds within 7 km and urban/ forest lands of watersheds within 24 km. These results demonstrate significant effects of land use on the coral reef ecosystems of the island, and the importance of appropriate combinations of analytical scales and biogeo-chemical indicators.

引用

页数：11