Seagrass Biodiversity Under the Latest-Generation Scenarios of Projected Climate Change

IF 3.4 2区 环境科学与生态学 Q2 ECOLOGY
Lidiane Gouvêa, Eliza Fragkopoulou, Miguel B. Araújo, Ester A. Serrão, Jorge Assis
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Abstract

Aim

The potentially cascading consequences of climate changes on redistribution of habitat-forming species, like seagrasses, remain a major research gap. Empirical demonstrations of local population changes are increasingly reported without a globally integrated predictive framework as a leading testable hypothesis. Therefore, here, we aimed to estimate changes in species richness, community composition, and areas of climatic refugia under future climate scenarios.

Location

Global scale.

Time Period

Present-day conditions (from 2010 to 2020) and for three Shared Socioeconomic Pathway (SSP) scenarios of future climate change (from 2090 to 2100).

Major Taxa Studies

Seagrasses (plantae).

Methods

We coupled seagrass occurrences with environmental predictors (temperature, salinity, nitrate, wave energy, and ice) in stacked species distribution modelling.

Results

Models estimated a present global extent of 917,169 km2 with high species richness in Temperate Australasia, Indo-Pacific, and Temperate North Pacific. Future projections predicted widespread spatial redistribution, with Arctic expansions, losses in lower latitudes, and deeper vertical ranges, while globally maintaining the area extent occupied worldwide by seagrass species (only 5% of change). Species richness increased poleward under more drastic scenarios (SSP3-7.0 and SSP5-8.5), with losses in tropical zones (30oN to 30oS). Local climatic refugia are retained in all scenarios but decrease under higher emissions. Additionally, even where seagrass species remain, widespread community composition changes were predicted.

Main Conclusions

Our findings serve as baselines to inform, anticipate, and mitigate cascading consequences of shifts in seagrass ecosystems that provide essential services for humanity.

最新一代气候变化预估情景下的海草生物多样性
气候变化对形成栖息地的物种(如海草)重新分配的潜在连锁后果,仍然是一个主要的研究空白。越来越多的关于地方人口变化的实证报告,没有一个全球一体化的预测框架作为主要的可检验假设。因此,本文旨在估计未来气候情景下物种丰富度、群落组成和气候避难所面积的变化。全球规模。当前条件(2010 - 2020年)和未来气候变化的三个共享社会经济路径(SSP)情景(2090 - 2100年)。主要分类群研究海草(植物)。方法在堆叠物种分布模型中,将海草的发生与环境预测因子(温度、盐度、硝酸盐、波浪能和冰)相结合。结果在温带澳大拉西亚、印度太平洋和温带北太平洋地区,物种丰富度较高,目前全球范围为917,169 km2。未来的预测预测了广泛的空间再分配,北极扩张,低纬度和更深的垂直范围的损失,而全球范围内海草物种占据的面积范围保持不变(仅占变化的5%)。物种丰富度在极端情景下(SSP3-7.0和SSP5-8.5)向极地方向增加,热带地区(30oN至30oS)减少。在所有情况下都保留了当地的气候难民,但在高排放情况下会减少。此外,即使在海草物种保留的地方,也预测了广泛的群落组成变化。我们的研究结果可作为了解、预测和减轻为人类提供基本服务的海草生态系统变化的级联后果的基线。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Biogeography
Journal of Biogeography 环境科学-生态学
CiteScore
7.70
自引率
5.10%
发文量
203
审稿时长
2.2 months
期刊介绍: Papers dealing with all aspects of spatial, ecological and historical biogeography are considered for publication in Journal of Biogeography. The mission of the journal is to contribute to the growth and societal relevance of the discipline of biogeography through its role in the dissemination of biogeographical research.
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