Riparian trees and aridland streams of the southwestern United States: An assessment of the past, present, and future

Smith, Douglas M.; Finch, Deborah M.

doi:10.1016/j.jaridenv.2016.08.016

Cited by 12 publications

(8 citation statements)

References 93 publications

(124 reference statements)

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“…Declines in fish and riparian species diversity [ 118 – 120 ] and increases in riparian tree stress and mortality [ 121 , 122 ] have been associated with low or intermittent seasonal flows, low groundwater levels, and drought conditions in the Southwest. Modeling suggests that flows and groundwater recharge in central Arizona will decline in the future, due to climate change [ 21 , 123 – 125 ] and rising human water demand [ 126 ], further imperiling water-dependent species.…”

Section: Discussionmentioning

confidence: 99%

A century of changing flows: Forest management changed flow magnitudes and warming advanced the timing of flow in a southwestern US river

2017

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The continued provision of water from rivers in the southwestern United States to downstream cities, natural communities and species is at risk due to higher temperatures and drought conditions in recent decades. Snowpack and snowfall levels have declined, snowmelt and peak spring flows are arriving earlier, and summer flows have declined. Concurrent to climate change and variation, a century of fire suppression has resulted in dramatic changes to forest conditions, and yet, few studies have focused on determining the degree to which changing forests have altered flows. In this study, we evaluated changes in flow, climate, and forest conditions in the Salt River in central Arizona from 1914–2012 to compare and evaluate the effects of changing forest conditions and temperatures on flows. After using linear regression models to remove the influence of precipitation and temperature, we estimated that annual flows declined by 8–29% from 1914–1963, coincident with a 2-fold increase in basal area, a 2-3-fold increase in canopy cover, and at least a 10-fold increase in forest density within ponderosa pine forests. Streamflow volumes declined by 37–56% in summer and fall months during this period. Declines in climate-adjusted flows reversed at mid-century when spring and annual flows increased by 10–31% from 1964–2012, perhaps due to more winter rainfall. Additionally, peak spring flows occurred about 12 days earlier in this period than in the previous period, coincident with winter and spring temperatures that increased by 1–2°C. While uncertainties remain, this study adds to the knowledge gained in other regions that forest change has had effects on flow that were on par with climate variability and, in the case of mid-century declines, well before the influence of anthropogenic warming. Current large-scale forest restoration projects hold some promise of recovering seasonal flows.

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Section: Discussionmentioning

confidence: 99%

A century of changing flows: Forest management changed flow magnitudes and warming advanced the timing of flow in a southwestern US river

2017

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“…Ecosystems in arid and semi-arid environments are particularly sensitive to variations in temperature, precipitation and natural resource overexploitation [ 5 – 8 ]. Accelerated land-use change in the arid southwestern United States coupled with drought, have compromised ecosystems services supporting a diversity of species [ 9 – 11 ]. Largely driven by human activities, landscape fragmentation, increasing water scarcity, soil erosion, and productivity loss have broad-scale impacts on humans and wildlife [ 12 – 14 ].…”

Section: Introductionmentioning

confidence: 99%

Land Use, anthropogenic disturbance, and riverine features drive patterns of habitat selection by a wintering waterbird in a semi-arid environment

et al. 2018

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River ecosystems in semi-arid environments provide an array of resources that concentrate biodiversity, but also attract human settlement and support economic development. In the southwestern United States, land-use change, drought, and anthropogenic disturbance are compounding factors which have led to departures from historical conditions of river ecosystems, consequently affecting wildlife habitat, including important wintering areas for migratory birds. The Rio Grande (River) in central New Mexico is the lifeblood of the Middle Rio Grande Valley (MRGV), maintaining large urban and agricultural centers and riparian and wetland resources, which disproportionately support a diversity of wildlife. The MRGV has been identified as the most important wintering area for the Rocky Mountain Population of greater sandhill cranes (Antigone canadensis tabida). Presently, however, changes in the hydrogeomorphology of the Rio Grande and landscape modification by humans have reshaped the MRGV and winter habitat for sandhill cranes. To evaluate these impacts, we investigated how land-use practices, anthropogenic disturbance, and river morphology influenced patterns of diurnal and roosting habitat selection by sandhill cranes. During the diurnal period, sandhill cranes relied heavily on managed public lands selecting agriculture crops, such as corn fields, and wetlands for foraging and loafing while avoiding areas with increasing densities of human structures. Sandhill cranes selected areas for roosting in the Rio Grande characterized by shallower water interspersed with sandbars, wide channel width, low bank vegetation, and farther away from disturbances associated with bridges. Our results establish and identify the central processes driving patterns of diel habitat selection by wintering sandhill cranes. Land use and riverine trends have likely gradually reduced winter habitat to managed public lands and limited reaches of the Rio Grande, underscoring the importance of natural resources agencies in supporting migratory birds and challenges involved when managing for wildlife in highly pressured semi-arid environments.

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“…Cela se traduit pour les espèces pionnières et donc pour l'Érable négondo, par une croissance radiale plus faible par manque de disponibilité en eau et par une moindre régénération, du fait de la raréfaction de zones perturbées (Johnson et al 1976 ;DeWine & Cooper 2007). Ce phénomène est encore plus marqué en climat plus sec tel celui de l'Arizona où le débit des rivières devient intermittent du fait de la surconsommation d'eau (Medina 1990 ;Smith & Finch 2016 Sa dynamique est assez rapide dans la vallée du Mississipi, puisque cette essence s'installe juste après les essences pionnières que sont les peupliers et les saules, avant les frênes et ormes et surtout bien avant le chêne. Elle est considérée comme espèce méso-riparienne par Smith & Finch (2016).…”

Section: Mortalitéunclassified

“…oiseaux Concernant les Oiseaux, peu d'espèces nichent dans l'Érable négondo aux États-Unis. Il abrite toutefois la Paruline de Lucy (Leiothlypis luciae Cooper, 1861), une espèce à niche restreinte, qui utilise les anciens trous de pics (Smith & Finch 2016). Cet arbre revêt un intérêt particulier pour les naturalistes dans la mesure où il est utilisé préférentiellement par la Moucherole des saules (Empidonax traillii Audubon, 1828), une espèce en danger.…”

Section: Micro-organismesunclassified

Que savons-nous de l’Érable négondo Acer negundo L. ?

Dumas¹

2019

Naturae

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Cet article fait le point sur les connaissances concernant l’Érable négondo Acer negundo L. en analysant le contenu de bases de données et de la littérature scientifique, soit un peu plus de 200 articles. Cet arbre est introduit en France depuis près de trois siècles. Il bénéficie d’une grande amplitude écologique, ce qui le rend apte à une utilisation en ville et en ornement. Doté de bonnes capacités de dispersion, il gagne les milieux rivulaires comparables à ceux qu’il occupe dans son aire d’origine pour devenir envahissant aux alentours des années 2000. Selon les modèles établis, les changements globaux devraient favoriser son développement. Son feuillage dense provoque des modifications du cortège floristique et limite la capacité de régénération des essences autochtones. Dans certains sites envahis, la diversité et la biomasse de la Flore du sous-bois sont fortement impactées. Ces modifications de la Flore ont en cascade un impact potentiel sur les autres maillons de la chaîne trophique. Le caractère allergène de son pollen peut causer des problèmes de santé en ville, mais les variétés plantées sont souvent des clones femelles n’induisant pas ce risque. Les chevaux sont en revanche sensibles à des intoxications en cas de consommation de samares. Des techniques de contrôle sont efficaces pour limiter son envahissement.

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Riparian trees and aridland streams of the southwestern United States: An assessment of the past, present, and future

Cited by 12 publications

References 93 publications

A century of changing flows: Forest management changed flow magnitudes and warming advanced the timing of flow in a southwestern US river

A century of changing flows: Forest management changed flow magnitudes and warming advanced the timing of flow in a southwestern US river

Land Use, anthropogenic disturbance, and riverine features drive patterns of habitat selection by a wintering waterbird in a semi-arid environment

Que savons-nous de l’Érable négondo Acer negundo L. ?

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