清晨好,您是今天最早来到科研通的研友!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您科研之路漫漫前行!

Modelling salt-marsh vegetation dynamics through species dispersal and competition

盐沼 沼泽 环境科学 盐生植物 潮间带 湿地 生态系统 大米草属 生态学 植被(病理学) 生物扩散 河口 沉积(地质) 海洋学 沉积物 盐度 地质学 生物 地貌学 人口 人口学 社会学 病理 医学
作者
Alvise Finotello,Enrico Bertuzzo,Andrea D’Alpaos,Marco Marani
标识
DOI:10.5194/egusphere-egu21-13174
摘要

<p>Salt marshes are widespread morphological features in coastal and estuarine tidal landscapes, and are ecologically and economically important as they significantly contribute to coastal primary production, support high biodiversity, and provide a broad range of valuable ecosystem services.</p><p>The ability of salt marshes to counteract changes in external forcings depends on the complex dynamic interactions between physical and biological processes acting at different spatial and temporal scales. In particular, the evolution of tidal marshes in the vertical direction results from the balance and feedbacks between organic and inorganic deposition, erosion, and changes in relative sea level. For example, colonization of salt marsh platforms by halophytic vegetation enhances both organic and inorganic deposition due to increased flow resistance, reduced bottom shear stresses, capture of sediment particles by plant stems, and direct biomass accumulation. Moreover, halophytes control soil aeration, which feeds back into vegetation zonation and the related biogeomorphic interactions typically observed in tidal marshes.</p><p>In spite of their importance, however, modeling vegetation dynamics in intertidal marshes remains a major challenge both at the theoretical and practical/numerical level. Improving our current understandings of the mechanisms that drive the zonation of halophytic species is of critical importance to enhance projections of salt-marsh response to changes in climate and relative sea level.</p><p>Here we present a new bi-dimensional, spatially explicit ecological model aimed to simulate the spatial dynamics of halophytic vegetation in tidal saline wetlands. Vegetation dynamics are treated differently compared to previous models, which employed relatively simple deterministic or probabilistic mechanisms, dictated only by the ability of different species to adapt to different topographic elevations. In our model, in contrast, spatial vegetation dynamics depend not only on the local habitat quality, but also on spatially explicit mechanism of dispersal and competition among multiple, potentially interacting species. The temporal evolution of vegetation biomass at each site depends on death and colonization processes, both local and resulting from dispersal. These processes are modulated for each species by the habitat quality of the considered site. The latter is synthesized only through the local elevation relative to the mean sea level, and is mathematically modeled using a logistic function that represents the theoretical niche of each considered species.</p><p>Results indicate that such a relatively simple model, where species have elevation-dependent fitness and otherwise neutral traits, can predict realistic diversity and species-richness patterns. More importantly, the model is also able to effectively reproduce the outcome of classical ecological experiments, in which a species is transplanted to an area outside its optimal (realized) niche. A direct comparison clearly shows how previous models not accounting for dispersal and interspecific competitions are unable to reproduce such dynamics.</p>

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
17秒前
yzhilson完成签到 ,获得积分0
38秒前
可爱的函函应助葵小葵采纳,获得10
55秒前
共享精神应助容若采纳,获得10
1分钟前
tails完成签到,获得积分10
1分钟前
眼里的萧萧雨完成签到,获得积分20
1分钟前
深情安青应助科研通管家采纳,获得10
1分钟前
ding应助容若采纳,获得10
2分钟前
2分钟前
小宏发布了新的文献求助10
2分钟前
顾矜应助容若采纳,获得10
3分钟前
小宏完成签到,获得积分10
3分钟前
两个榴莲完成签到,获得积分0
4分钟前
Hello应助容若采纳,获得10
4分钟前
千里草完成签到,获得积分10
4分钟前
4分钟前
量子星尘发布了新的文献求助10
5分钟前
隐形曼青应助容若采纳,获得10
5分钟前
斯文败类应助研友_拓跋戾采纳,获得10
5分钟前
5分钟前
bsmark发布了新的文献求助10
5分钟前
6分钟前
爆米花应助bsmark采纳,获得10
6分钟前
不能吃太饱完成签到 ,获得积分10
6分钟前
桐桐应助容若采纳,获得10
7分钟前
激动的似狮完成签到,获得积分10
7分钟前
7分钟前
加贝完成签到 ,获得积分10
7分钟前
毛毛完成签到,获得积分10
8分钟前
灿烂而孤独的八戒完成签到 ,获得积分0
8分钟前
ph完成签到 ,获得积分10
8分钟前
隐形曼青应助容若采纳,获得10
8分钟前
8分钟前
bsmark发布了新的文献求助10
8分钟前
玛卡巴卡爱吃饭完成签到 ,获得积分10
9分钟前
9分钟前
爆米花应助容若采纳,获得10
9分钟前
ximitona完成签到,获得积分10
9分钟前
ximitona发布了新的文献求助10
9分钟前
10分钟前
高分求助中
(应助此贴封号)【重要!!请各用户(尤其是新用户)详细阅读】【科研通的精品贴汇总】 10000
SOFT MATTER SERIES Volume 22 Soft Matter in Foods 1000
Zur lokalen Geoidbestimmung aus terrestrischen Messungen vertikaler Schweregradienten 1000
Rapid synthesis of subnanoscale high-entropy alloys with ultrahigh durability 666
Storie e culture della televisione 500
Selected research on camelid physiology and nutrition 500
《2023南京市住宿行业发展报告》 500
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 内科学 生物化学 物理 计算机科学 纳米技术 遗传学 基因 复合材料 化学工程 物理化学 病理 催化作用 免疫学 量子力学
热门帖子
关注 科研通微信公众号,转发送积分 4889508
求助须知:如何正确求助?哪些是违规求助? 4173518
关于积分的说明 12952156
捐赠科研通 3934961
什么是DOI,文献DOI怎么找? 2159148
邀请新用户注册赠送积分活动 1177466
关于科研通互助平台的介绍 1082396