土壤与其他环境变量之间的相互作用调节了中非潮湿热带草原的森林扩张和生态区动态。

IF 3.8 1区 生物学 Q1 BIOLOGY Proceedings of the Royal Society B: Biological Sciences Pub Date : 2024-10-01 Epub Date: 2024-10-30 DOI:10.1098/rspb.2024.1120
Le Bienfaiteur Takougoum Sagang, Imma Tcheferi, Pierre Ploton, Moses Libalah, Murielle Simo-Droissart, Nelly Sirri, Gilles Dauby, Eric Ngansop, Jean Pierre Bissek, Narcisse Kamdem, Gislain I I Mofack, Donatien Zebaze, Hugo Leblanc, Fabrice Djonko, Bonaventure Sonké, Nicolas Barbier, Pierre Couteron
{"title":"土壤与其他环境变量之间的相互作用调节了中非潮湿热带草原的森林扩张和生态区动态。","authors":"Le Bienfaiteur Takougoum Sagang, Imma Tcheferi, Pierre Ploton, Moses Libalah, Murielle Simo-Droissart, Nelly Sirri, Gilles Dauby, Eric Ngansop, Jean Pierre Bissek, Narcisse Kamdem, Gislain I I Mofack, Donatien Zebaze, Hugo Leblanc, Fabrice Djonko, Bonaventure Sonké, Nicolas Barbier, Pierre Couteron","doi":"10.1098/rspb.2024.1120","DOIUrl":null,"url":null,"abstract":"<p><p>Forest expansion into savanna is a pervasive phenomenon in West and Central Africa, warranting comparative studies under diverse environmental conditions. We collected vegetation data from the woody and grassy components within 73 plots of 0.16 ha distributed along a successional gradient from humid savanna to forest in Central Africa. We associated spatially collocated edaphic parameters and fire frequency derived from remote sensing to investigate their combined influence on the vegetation. Soil texture was more influential in shaping savanna structure and species distribution than soil fertility, with clay-rich soils promoting higher grass productivity and fire frequency. Savanna featuring woody aboveground biomass surpassing 40 Mg ha<sup>-1</sup> could escape the grass-fire feedback loop, by depressing grass biomass below 4 Mg ha<sup>-1</sup>. This thicker woody layer also favoured the establishment of fire-tolerant forest pioneers, which synergically contributed to the expansion of forests. Conversely, savannas below this fire suppression threshold sustained a balance between trees and grasses through the grass-fire feedback mechanism. This hysteresis loop, particularly pronounced on clayey soils, suggests that the contrast between grassy savanna and young forests might represent alternative ecosystem states, although savannas with low woody biomass remained vulnerable to forest edge encroachment.</p>","PeriodicalId":20589,"journal":{"name":"Proceedings of the Royal Society B: Biological Sciences","volume":"291 2033","pages":"20241120"},"PeriodicalIF":3.8000,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11521620/pdf/","citationCount":"0","resultStr":"{\"title\":\"Interactions between soil and other environmental variables modulate forest expansion and ecotone dynamics in humid savannas of Central Africa.\",\"authors\":\"Le Bienfaiteur Takougoum Sagang, Imma Tcheferi, Pierre Ploton, Moses Libalah, Murielle Simo-Droissart, Nelly Sirri, Gilles Dauby, Eric Ngansop, Jean Pierre Bissek, Narcisse Kamdem, Gislain I I Mofack, Donatien Zebaze, Hugo Leblanc, Fabrice Djonko, Bonaventure Sonké, Nicolas Barbier, Pierre Couteron\",\"doi\":\"10.1098/rspb.2024.1120\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Forest expansion into savanna is a pervasive phenomenon in West and Central Africa, warranting comparative studies under diverse environmental conditions. We collected vegetation data from the woody and grassy components within 73 plots of 0.16 ha distributed along a successional gradient from humid savanna to forest in Central Africa. We associated spatially collocated edaphic parameters and fire frequency derived from remote sensing to investigate their combined influence on the vegetation. Soil texture was more influential in shaping savanna structure and species distribution than soil fertility, with clay-rich soils promoting higher grass productivity and fire frequency. Savanna featuring woody aboveground biomass surpassing 40 Mg ha<sup>-1</sup> could escape the grass-fire feedback loop, by depressing grass biomass below 4 Mg ha<sup>-1</sup>. This thicker woody layer also favoured the establishment of fire-tolerant forest pioneers, which synergically contributed to the expansion of forests. Conversely, savannas below this fire suppression threshold sustained a balance between trees and grasses through the grass-fire feedback mechanism. This hysteresis loop, particularly pronounced on clayey soils, suggests that the contrast between grassy savanna and young forests might represent alternative ecosystem states, although savannas with low woody biomass remained vulnerable to forest edge encroachment.</p>\",\"PeriodicalId\":20589,\"journal\":{\"name\":\"Proceedings of the Royal Society B: Biological Sciences\",\"volume\":\"291 2033\",\"pages\":\"20241120\"},\"PeriodicalIF\":3.8000,\"publicationDate\":\"2024-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11521620/pdf/\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Proceedings of the Royal Society B: Biological Sciences\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1098/rspb.2024.1120\",\"RegionNum\":1,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2024/10/30 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"BIOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the Royal Society B: Biological Sciences","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1098/rspb.2024.1120","RegionNum":1,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/10/30 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"BIOLOGY","Score":null,"Total":0}
引用次数: 0

摘要

森林向热带稀树草原扩张是西非和中非的普遍现象,因此需要在不同环境条件下进行比较研究。我们收集了中非从湿润稀树草原到森林的演替梯度上分布的 73 个 0.16 公顷小区内的木质和草质植被数据。我们将空间定位的环境参数和遥感得出的火灾频率联系起来,研究它们对植被的综合影响。与土壤肥力相比,土壤质地对热带稀树草原结构和物种分布的影响更大,富含粘土的土壤可提高草的生产力和火灾频率。热带稀树草原的地上木质生物量超过 4000 万克/公顷-1,可使草的生物量低于 400 万克/公顷-1,从而摆脱草-火的反馈循环。较厚的木质层也有利于建立耐火的森林先锋,从而协同促进森林的扩展。相反,低于这一防火阈值的热带稀树草原则通过草-火反馈机制维持树木和草之间的平衡。这种滞后循环在粘质土壤上尤为明显,表明多草稀树草原和幼林之间的对比可能代表了另一种生态系统状态,尽管木质生物量低的稀树草原仍然容易受到森林边缘的侵袭。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Interactions between soil and other environmental variables modulate forest expansion and ecotone dynamics in humid savannas of Central Africa.

Forest expansion into savanna is a pervasive phenomenon in West and Central Africa, warranting comparative studies under diverse environmental conditions. We collected vegetation data from the woody and grassy components within 73 plots of 0.16 ha distributed along a successional gradient from humid savanna to forest in Central Africa. We associated spatially collocated edaphic parameters and fire frequency derived from remote sensing to investigate their combined influence on the vegetation. Soil texture was more influential in shaping savanna structure and species distribution than soil fertility, with clay-rich soils promoting higher grass productivity and fire frequency. Savanna featuring woody aboveground biomass surpassing 40 Mg ha-1 could escape the grass-fire feedback loop, by depressing grass biomass below 4 Mg ha-1. This thicker woody layer also favoured the establishment of fire-tolerant forest pioneers, which synergically contributed to the expansion of forests. Conversely, savannas below this fire suppression threshold sustained a balance between trees and grasses through the grass-fire feedback mechanism. This hysteresis loop, particularly pronounced on clayey soils, suggests that the contrast between grassy savanna and young forests might represent alternative ecosystem states, although savannas with low woody biomass remained vulnerable to forest edge encroachment.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
CiteScore
7.90
自引率
4.30%
发文量
502
审稿时长
1 months
期刊介绍: Proceedings B is the Royal Society’s flagship biological research journal, accepting original articles and reviews of outstanding scientific importance and broad general interest. The main criteria for acceptance are that a study is novel, and has general significance to biologists. Articles published cover a wide range of areas within the biological sciences, many have relevance to organisms and the environments in which they live. The scope includes, but is not limited to, ecology, evolution, behavior, health and disease epidemiology, neuroscience and cognition, behavioral genetics, development, biomechanics, paleontology, comparative biology, molecular ecology and evolution, and global change biology.
期刊最新文献
Cooling down is as important as warming up for a large-bodied tropical reptile. Global analysis of acoustic frequency characteristics in birds. Greater plasticity in CTmax with increased climate variability among populations of tailed frogs. Identifying signatures of the earliest benthic bulldozers in emergent subaerial conditions during the colonization of land by animals. Inbreeding avoidance and cost in a small, isolated trout population.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1