Effect of water delivery and irrigation for riparian restoration in the Colorado River Delta, Mexico

IF 2.8 3区 环境科学与生态学 Q2 ECOLOGY Restoration Ecology Pub Date : 2024-07-04 DOI:10.1111/rec.14226
Pamela L. Nagler, Ibrahima Sall, Martha M. Gómez‐Sapiens, Karl W. Flessa, Armando Barreto‐Muñoz, Kamel Didan
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Abstract

Along Mexico's arid Colorado River Delta, the riparian corridor lacks water due to a reduction in frequent flows, climate change, human infrastructure, and altered riparian landcover from disturbances to invasive species, fire, and high soil and water salinities, which have led to declines in riparian plant health in recent decades. Restoration efforts focusing on small plots have successfully revitalized habitat, which is the motivation for this research. Accurate estimations of water use by riparian vegetation are crucial in arid environments, where measuring actual evapotranspiration (ETa) poses a significant challenge in these narrow corridors. This study utilizes field‐validated remote sensing techniques to quantify ETa at restoration sites. Our methods are twofold; we use the Landsat‐8 two‐band Enhanced Vegetation Index (EVI2) to monitor changes in vegetation greenness—a proxy of plant health—and we integrate EVI2 with potential evapotranspiration (ET) to calculate ETa. Our findings reveal a notable increase in vegetation greenness within the restoration sites over 9 years, with an average increase of 41.3%. Conversely, greenness in adjacent, unrestored control areas declined by 27.3%. The study also indicates a 22.1% increase in ETa in the restored areas, compared to a 30.8% reduction in the unrestored regions. Restored sites in reach 4 experienced ETa increases ranging from 9.2 to 12.2%, whereas their unrestored counterparts show a decline of 21.4%. Valuable estimates are provided of riparian greenness and water use that may assist natural resource managers who are tasked with allocating water and managing habitats within similar riparian corridors.
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输水和灌溉对墨西哥科罗拉多河三角洲河岸恢复的影响
在墨西哥干旱的科罗拉多河三角洲沿岸,河岸走廊缺水,原因包括流量减少、气候变化、人类基础设施以及入侵物种、火灾和高水土盐度等干扰导致的河岸地貌改变,这些因素导致近几十年来河岸植物健康状况下降。以小地块为重点的恢复工作成功地恢复了栖息地,这也是本研究的动机所在。在干旱环境中,准确估算河岸植被的用水量至关重要,而测量实际蒸散量(ETa)在这些狭窄的走廊中是一项重大挑战。本研究利用经过实地验证的遥感技术来量化恢复地点的蒸散量。我们的方法包括两个方面:使用 Landsat-8 双波段增强植被指数 (EVI2) 监测植被绿度的变化(植被绿度是植物健康的代表),并将 EVI2 与潜在蒸散量 (ET) 结合起来计算 ETa。我们的研究结果表明,在 9 年的时间里,恢复地点的植被绿度显著增加,平均增加 41.3%。相反,相邻的未修复对照区的绿度则下降了 27.3%。研究还表明,恢复区域的蒸散发系数(ETa)增加了 22.1%,而未恢复区域则减少了 30.8%。4 号河段的恢复区的蒸散发系数增加了 9.2% 至 12.2%,而未恢复区的蒸散发系数则下降了 21.4%。对河岸绿化和用水情况的估算很有价值,可以帮助自然资源管理者在类似的河岸走廊内分配水资源和管理栖息地。
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来源期刊
Restoration Ecology
Restoration Ecology 环境科学-生态学
CiteScore
6.50
自引率
15.60%
发文量
226
审稿时长
12-24 weeks
期刊介绍: Restoration Ecology fosters the exchange of ideas among the many disciplines involved with ecological restoration. Addressing global concerns and communicating them to the international research community and restoration practitioners, the journal is at the forefront of a vital new direction in science, ecology, and policy. Original papers describe experimental, observational, and theoretical studies on terrestrial, marine, and freshwater systems, and are considered without taxonomic bias. Contributions span the natural sciences, including ecological and biological aspects, as well as the restoration of soil, air and water when set in an ecological context; and the social sciences, including cultural, philosophical, political, educational, economic and historical aspects. Edited by a distinguished panel, the journal continues to be a major conduit for researchers to publish their findings in the fight to not only halt ecological damage, but also to ultimately reverse it.
期刊最新文献
How does restoration ecology consider climate change uncertainties in forested ecosystems? Does decline and recovery process affect clonal and genetic diversity of a coastal plant population? Salt tolerance of native trees relevant to the restoration of degraded landscapes in the Monte region, Argentina Frequency of association: a key indicator for assessing livestock grazing effects on dryland plant interactions, applicable in restoration Low retention of restocked laboratory‐reared long‐spined sea urchins Diadema antillarum due to Spanish hogfish Bodianus rufus predation
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