Soil bacteria and fungi on tropical mountainsides: Joint effects of weathering, climate, and chemical factors

被引：0

作者：

Ren, Minglei ^{[1
,2
]}

Xu, Jianing ^{[1
,2
,3
]}

Geng, Mengdie ^{[1
,2
]}

Zhang, Lu ^{[1
,2
]}

Kimirei, Ismael Aaron ^{[4
]}

Xu, Yan ^{[3
]}

Wang, Jianjun ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Nanjing Inst Geog & Limnol, Key Lab Lake & Watershed Sci Water Secur, Nanjing 210008, Peoples R China

[2] Chinese Acad Sci, Nanjing Inst Geog & Limnol, State Key Lab Lake Sci & Environm, Nanjing 210008, Peoples R China

[3] Southeast Univ, Sch Civil Engn, Dept Municipal Engn, Nanjing 210096, Peoples R China

[4] Tanzania Fisheries Res Inst, POB 9750, Dar Es Salaam, Tanzania

来源：

ENVIRONMENTAL RESEARCH | 2024年 / 263卷

基金：

中国国家自然科学基金;

关键词：

Elevational patterns; Weathering process; Bacteria; Fungi; Soil; Diversity; MICROBIAL DIVERSITY; SPECIES-DIVERSITY; BETA DIVERSITY; BIODIVERSITY; KILIMANJARO; COMMUNITIES; ELEVATION; ABUNDANCE; ECOLOGY; RICHNESS;

D O I：

10.1016/j.envres.2024.120027

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Contemporary environmental factors such as temperature and pH are generally identified as primary influences on microbial diversity, while the role of geological processes remain understudied. Here, we investigated the diversity and community composition of bacteria and fungi along an elevational gradient from703 to 4514 m on Mt. Kilimanjaro, East Africa. We further examined the effects of contemporary environment and geological processes such as weathering on microbial communities and diversities. For community composition, bacteria and fungi showed clear differentiation along elevations and their community dissimilarities increased with elevational distance indicating elevational distance-decay relationships. Multiple variables such as weathering, climate and chemical factors were significantly associated with microbial communities and showed greater effects on bacterial than fungal communities. Specifically, soil pH mainly shaped bacterial communities, while mean annual temperature for fungi, followed by other variables such as weathering processes. For Shannon diversity, bacteria and fungi showed significant hump-shaped elevational patterns with the peak values at 1857 and 1436 m, respectively. Shannon diversity was mainly affected by soil weathering accounting for 8.9% of the total variance for bacteria, while jointly by weathering and climate accounted for 14.3% of fungi. For the community uniqueness, represented by local contribution to beta diversity (LCBD), there were U-shaped patterns for both taxonomic groups. LCBD was mainly explained by the joint effects of chemical and climate variables which accounted for 51.1% and 33.4% for bacteria and fungi, respectively. Our results highlight the effects of soil weathering processes on diversity and community composition for bacteria and fungi. Thus, the integration of weathering with contemporary environments could provide new insights into microbial elevational diversity patterns.

引用

页数：11