Vegetation and Habitats in a Southwestern Volcanic Area

Lindsey, Alton A.

doi:10.2307/1943559

Cited by 23 publications

(11 citation statements)

References 17 publications

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“…It would be expected to occur lower altitudinally as it occurred farther north but such is not the case. These facts agree with the observation of Lindsey ( 1951) that J. pachyphloea is influenced to a high degree by the substrate, as opposed to the climatic factor.…”

Section: Differential Moisture Requirementssupporting

confidence: 92%

Juniper-Pinyon East of the Continental Divide, as Analyzed by the Line-Strip Method

Woodin¹,

Lindsey²

1954

Ecology

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Section: Differential Moisture Requirementssupporting

confidence: 92%

Juniper-Pinyon East of the Continental Divide, as Analyzed by the Line-Strip Method

Woodin¹,

Lindsey²

1954

Ecology

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“…This paradox may result because of minimal ground-flora competition, deep subsoils (> 1.5 m) consisting of alternating cinder-soil layers retaining subsoil moisture, or loose soils facilitating development of extensive, branched root systems (Haasis, 1921). Colton (1932) also noted that rapid diameter growth occurred on black cinder soils near Sunset Crater in the study area, and Lindsey (1951) found that the greatest mean increment of 3.4 mm year )1 among central New Mexico soils he studied occurred on volcanic cinder soils.…”

Section: Pinus Ponderosa Growthmentioning

confidence: 86%

Forest ecosystems of an Arizona Pinus ponderosa landscape: multifactor classification and implications for ecological restoration

Abella¹,

Covington

2006

Journal of Biogeography

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Aim We developed an ecosystem classification within a 110,000-ha Arizona Pinus ponderosa P. & C. Lawson (ponderosa pine) landscape to support ecological restoration of these forests. Specific objectives included identifying key environmental variables constraining ecosystem distribution and comparing plant species composition, richness and tree growth among ecosystems.Location The Coconino National Forest and the Northern Arizona University Centennial Forest, in northern Arizona, USA.Methods We sampled geomorphology, soils and vegetation on 66 0.05-ha plots in open stands containing trees of pre-settlement (c. 1875) origin, and on 26 plots in dense post-settlement stands. Using cluster analysis and ordination of vegetation and environment matrices, we classified plots into ecosystem types internally similar in environmental and vegetational characteristics. ResultsWe identified 10 ecosystem types, ranging from dry, black cinders/ Phacelia ecosystems to moist aspen/Lathyrus ecosystems. Texture, organic carbon and other soil properties reflecting the effects of parent materials structured ecosystem distribution across the landscape, and geomorphology was locally important. Plant species composition was ecosystem-specific, with C 3 Festuca arizonica Vasey (Arizona fescue), for instance, abundant in mesic basalt/Festuca ecosystems. Mean P. ponderosa diameter increments ranged from 2.3-4.3 mm year )1 across ecosystems in stands of pre-settlement origin, and the ecosystem classification was robust in dense post-settlement stands.Main conclusions Several lines of evidence suggest that although species composition may have been altered since settlement, the same basic ecosystems occurred on this landscape in pre-settlement forests, providing reference information for ecological restoration. Red cinders/Bahia ecosystems were rare historically and > 30% of their area has been burned by crown fires since 1950, indicating that priority could be given to restoring this ecosystem's remaining mapping units. Ecosystem classifications may be useful as data layers in gap analyses to identify restoration and conservation priorities. Ecosystem turnover occurs at broad extents on this landscape, and restoration must accordingly operate across large areas to encompass ecosystem diversity. By incorporating factors driving ecosystem composition, this ecosystem classification represents a framework for estimating spatial variation in ecological properties, such as species diversity, relevant to ecological restoration.

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“…The unique vegetation communities found on the lava flows at El Malpais were first described by Lindsey (1951), including the stunted slow-growing conifers. The sparsely vegetated and forbidding lava-rock terrain has been protected from grazing, logging, and other human impacts (Fig.…”

Section: Study Areamentioning

confidence: 99%

Cool- and Warm-Season Precipitation Reconstructions over Western New Mexico

et al. 2009

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Precipitation over the southwestern United States exhibits distinctive seasonality, and contrasting oceanatmospheric dynamics are involved in the interannual variability of cool-and warm-season totals. Tree-ring chronologies based on annual-ring widths of conifers in the southwestern United States are well correlated with accumulated precipitation and have previously been used to reconstruct cool-season and annual precipitation totals. However, annual-ring-width chronologies cannot typically be used to derive a specific record of summer monsoon-season precipitation. Some southwestern conifers exhibit a clear anatomical transition from the earlywood and latewood components of the annual ring, and these exactly dated subannual ring components can be measured separately and used as unique proxies of cool-and warm-season precipitation and their associated large-scale ocean-atmospheric dynamics. Two 2139-yr-long reconstructions of cool-(November-May) and early-warm season (July) precipitation have been developed from ancient conifers and relict wood at El Malpais National Monument, New Mexico. Both reconstructions have been verified on independent precipitation data and reproduce the spatial correlation patterns detected in the large-scale SST and 500-mb height fields using instrumental precipitation data from New Mexico. Aboveaverage precipitation in the cool-season reconstruction is related to El Niñ o conditions and to the positive phase of the Pacific decadal oscillation. Above-average precipitation in July is related to the onset of the North American monsoon over New Mexico and with anomalies in the 500-mb height field favoring moisture advection into the Southwest from the North Pacific, the Gulf of California, and the Gulf of Mexico. Cooland warm-season precipitation totals are not correlated on an interannual basis in the 74-yr instrumental or 2139-yr reconstructed records, but wet winter-spring extremes tend to be followed by dry conditions in July and very dry winters tend to be followed by wet Julys in the reconstructions. This antiphasing of extremes could arise from the hypothesized cool-to early-warm-season change in the sign of large-scale oceanatmospheric forcing of southwestern precipitation, from the negative land surface feedback hypothesis in which winter-spring precipitation and snow cover reduce surface warming and delay the onset of the monsoon, or perhaps from an interaction of both large-scale and regional forcing. Episodes of simultaneous interseasonal drought (''perfect'' interseasonal drought) persisted for a decade or more during the 1950s drought of the instrumental era and during the eighth-and sixteenth-century droughts, which appear to have been two of the most profound droughts over the Southwest in the past 1400 yr. Simultaneous interseasonal drought is doubly detrimental to dry-land crop yields and is estimated to have occurred during the midseventeenth-century famines of colonial New Mexico but was less frequent during the late-thirteenth-century Great Drought among the Anasazi, w...

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Vegetation and Habitats in a Southwestern Volcanic Area

Abstract: Bureau loaned an i~strument shelter and rain gage. Thanks ll:O to the officials and staff of the Nava io Fluorsnar Mine, particularly Mr.

Cited by 23 publications

References 17 publications

Juniper-Pinyon East of the Continental Divide, as Analyzed by the Line-Strip Method

Juniper-Pinyon East of the Continental Divide, as Analyzed by the Line-Strip Method

Forest ecosystems of an Arizona Pinus ponderosa landscape: multifactor classification and implications for ecological restoration

Cool- and Warm-Season Precipitation Reconstructions over Western New Mexico

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