Mammals of the Mexican boundary of the United States : a descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees

Mearns, Edgar Alexander

doi:10.5962/bhl.title.55866

Cited by 14 publications

(13 citation statements)

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“…Observations about the USCRV made by early settlers and travellers suggest that some sections of the Santa Cruz River were well vegetated with cottonwood forests before mechanized groundwater pumping enabled large‐scale agriculture in the valley (Mearns, ; Logan, ). By 1936, when the first set of aerial photographs of the valley were collected, the riparian zone had been modified by agricultural activities, although historical well data suggest that the intensity of groundwater pumping for agriculture and residential uses was less intense in the late 1930s than later in the century.…”

Section: Discussionmentioning

confidence: 99%

“…Historically, the reach of the USCRV from the USA/Mexico border to Amado, Arizona, flowed intermittently throughout the year, supporting only a modest amount of perennial woody riparian vegetation (Mearns, , Logan, , Webb et al , ). The NIWTP, established 13 km north of the border in 1972, undoubtedly changed the character of downstream riparian vegetation.…”

Section: Introductionmentioning

confidence: 99%

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The Influence of Wastewater Subsidy, Flood Disturbance and Neighbouring Land Use on Current and Historical Patterns of Riparian Vegetation in a Semi‐arid Watershed

Villarreal

Drake

Marsh

et al. 2011

River Research & Apps

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Riparian systems are among the most diverse and most threatened ecosystems in the western USA and consequently the focus of much conservation and restoration effort. Detailed mapping of existing riparian vegetation and quantitative description of historical riparian dynamics can inform and direct ecosystem conservation and restoration efforts. Using historical aerial photography, satellite imagery and field methods, we examine and compare historical riparian vegetation dynamics within catchments of varying land-use/water-use intensity along a 51-km stretch of the Santa Cruz River in Arizona, USA. We mapped current (2006 -2007) vegetation to a formation class level (dominant life form) through aerial photo-interpretation and refined the map to an alliance level (dominant species) with extensive field data. We mapped historical vegetation to the formation level using six dates of aerial photography (1936 -2004) and quantified rates of land-use and vegetation change over the 70-year period with spatial analysis techniques. Our results indicate that the current amount, distribution and diversity of vegetation alliances are linked to effluent supply. Sites receiving effluent since 1972 experienced a rapid increase in area of riparian forest and woodland from 1984 to 2004, followed by retrogression to herbaceous-dominated types from 2004 to 2006, the result of an extensive cottonwood tree die-off. Sites with no effluent subsidy are currently dominated by a mixture of riparian shrub and non-native herbaceous alliances but tend to have higher overall alliance diversity and exhibit more stability over time. These results suggest that the use of effluent for riparian restoration may have variable long-term effects depending on catchment land-use history.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Influence of Wastewater Subsidy, Flood Disturbance and Neighbouring Land Use on Current and Historical Patterns of Riparian Vegetation in a Semi‐arid Watershed

Villarreal

Drake

Marsh

et al. 2011

River Research & Apps

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“…In Arizona, the river remains intermittent for 20 km until it reaches the Nogales International Wastewater Treatment plant (NIWTP), which treats effluent from the cites of Nogales Arizona and Sonora, and releases the water into the river channel creating a permanent flow for approximately 30 km. This reach of the Santa Cruz River has developed a mature riparian corridor that likely matches river conditions when Spanish and Anglo-Americans first settled in the area (Mearns 1907;Bartlett 1965;Logan 2002). Primary land uses along this stretch of the Santa Cruz include urban and commercial land uses, golf courses and resorts, ranching, and agriculture.…”

Section: Study Areamentioning

confidence: 95%

Biodiversity losses and conservation trade-offs: assessing future urban growth scenarios for a North American trade corridor

Villarreal

Norman

Boykin

et al. 2013

International Journal of Biodiversity Science, Ecosystem Servic

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The Sonoran Desert and Apache Highlands ecoregions of North America are areas of exceptionally high plant and vertebrate biodiversity. However, much of the vertebrate biodiversity is supported by only a few vegetation types with limited distributions, some of which are increasingly threatened by changing land uses. We assessed the impacts of two future urban growth scenarios on biodiversity in a binational watershed in Arizona, USA and Sonora, Mexico. We quantified and mapped terrestrial vertebrate species richness using Wildlife Habitat Relation models and validated the results with data from National Park Service (NPS) biological inventories. Future urban growth, based on historical trends, was projected to the year 2050 for (1) a 'Current Trends' (CT) scenario and (2) a 'Megalopolis' (MEGA) scenario that represented a transnational growth corridor with open-space conservation attributes. Based on CT, 45% of existing riparian woodland (267 of 451species) and 34% of semi-desert grasslands (215 of 451 species) will be lost, whereas in the MEGA scenario, these types would decline by 44% and 24%, respectively. Outcomes of the two models suggest a trade-off at the taxonomic class level: CT would reduce and fragment mammal and herpetofauna habitat, while MEGA would result in loss of avian-rich riparian habitat.

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“…In 1894, Means (1907) estimated that native riparian vegetation covered about 160,000-180,000 ha of alluvial bottomland between Fort Mohave and Fort Yuma. As of 1986, there were only about 40,000 ha of riparian vegetation-roughly 25 percent of the bottomland estimated by Means Ohmart 1984, Younker andAnderson 1986).…”

Section: Chapter 6 Riparian Habitat and The Status Of Cuckoos In Thementioning

confidence: 99%

Yellow-Billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado and Tributaries, 2006 Annual Report

Johnson¹,

Holmes²,

Calvo³

et al. 2007

Open-File Report

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Mammals of the Mexican boundary of the United States : a descriptive catalogue of the species of mammals occurring in that region; with a general summary of the natural history, and a list of trees

Cited by 14 publications

References 0 publications

The Influence of Wastewater Subsidy, Flood Disturbance and Neighbouring Land Use on Current and Historical Patterns of Riparian Vegetation in a Semi‐arid Watershed

The Influence of Wastewater Subsidy, Flood Disturbance and Neighbouring Land Use on Current and Historical Patterns of Riparian Vegetation in a Semi‐arid Watershed

Biodiversity losses and conservation trade-offs: assessing future urban growth scenarios for a North American trade corridor

Yellow-Billed Cuckoo Distribution, Abundance, and Habitat Use Along the Lower Colorado and Tributaries, 2006 Annual Report

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