Deglaciation and Postglacial Vegetation History of the West Mountains, West-central Idaho, U.S.A.

Doerner, James P.; Carrara, Paul E.

doi:10.1080/15230430.1999.12003313

Cited by 11 publications

(20 citation statements)

References 23 publications

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“…The MRS watersheds have the greatest relief (average of 1286 m) (Figure b) and the greatest percent of forest cover of the 3 regimes (Table ). Densely forested areas are predominantly at higher elevations and are composed of a mixture of ponderosa pine, lodgepole pine and Douglas fir (Doerner and Carrara, ). The mean annual temperature of these watersheds is ~6 °C, with average December–May temperatures around 0 °C.…”

Section: Network Design and Site Characteristicsmentioning

confidence: 99%

Elevation‐dependent responses of streamflow to climate warming

Tennant

Crosby

Godsey

2014

Hydrological Processes

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Abstract:Warming will affect snowline elevation, potentially altering the timing and magnitude of streamflow from mountain landscapes. Presently, the assessment of potential elevation-dependent responses is difficult because many gauged watersheds integrate drainage areas that are both snow and rain dominated. To predict the impact of snowline rise on streamflow, we mapped the current snowline (1980 m) for the Salmon River watershed (Idaho, USA) and projected its elevation after 3°C warming (2440 m). This increase results in a 40% reduction in snow-covered area during winter months. We expand this analysis by collecting streamflow records from a new, elevation-stratified gauging network of watersheds contained within high (2250-3800 m), mid (1500-2250 m) and low (300-1500 m) elevations that isolate snow, mixed and rain-dominated precipitation regimes. Results indicate that lags between percentiles of precipitation and streamflow are much shorter in low elevations than in mid-and high-elevation watersheds. Low elevation annual percentiles (Q 25 and Q 75 ) of streamflow occur 30-50 days earlier than in higher elevation watersheds. Extreme events in low elevations are dominated by low-and no-flow events whereas mid-and high-elevation extreme events are primarily large magnitude floods. Only mid-and high-elevation watersheds are strongly cross correlated with catchment-wide flow of the Salmon River, suggesting that changes in contributions from low-elevation catchments may be poorly represented using mainstem gauges. As snowline rises, mid-elevation watersheds will likely exhibit behaviours currently observed only at lower elevations. Streamflow monitoring networks designed for operational decision making or change detection may require modification to capture elevation-dependent responses of streamflow to warming.

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Section: Network Design and Site Characteristicsmentioning

confidence: 99%

Elevation‐dependent responses of streamflow to climate warming

Tennant

Crosby

Godsey

2014

Hydrological Processes

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“…A-1), a radiocarbon age of 11,540±70 yr B.P. (WW-443) was obtained from a small spruce cone overlying a Glacier Peak ash in a bog at an elevation of 2,255 m (Doerner and Carrara, 1999). In this mountain range, timberline is at an elevation of about 2,285 m and is dominated by subalpine fir and whitebark pine, while treeline is at an elevation of about 2,380-2,500 m. However, the present-day limit of Engelmann spruce is at an elevation of about 2,250 m. It is not clear whether the small spruce cone recovered from the bog came from a full-sized tree or a krummholz form; nonetheless, by about 11,540 yr B.P.…”

Section: West Mountains Idahomentioning

confidence: 99%

Deglaciation and postglacial treeline fluctuation in the northern San Juan Mountains, Colorado

Carrara¹

2011

Professional Paper

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“…The biogeography of the Pacific Northwest of North America has been heavily influenced by Pleistocene glaciation. A glacial maximum was reached between 17,000 and 14,000 yr bp (Thackray et al, 2004); glaciers had receded from the region by c. 11,500 yr bp (Doerner & Carrara, 1999). Studies of plants, mammals, insects, fish, and crustaceans (Conroy & Cook, 2000;Althoff & Thompson, 2001;Arbogast et al, 2001;Edmands, 2001;Ettl & Peterson, 2001;Ritland et al, 2001;Smith et al, 2001;Small et al, 2003) have all found patterns consistent with recolonization during the glacial recession and periodic flooding that occurred.…”

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confidence: 99%

Patterns of genetic differentiation in Thamnophis and Taricha from the Pacific Northwest

Ridenhour

Brodie

2006

Journal of Biogeography

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Aim The co‐evolutionary interaction between the common garter snake, Thamnophis sirtalis, and the rough‐skinned newt, Taricha granulosa, takes place throughout much of the Pacific Northwest (North America). The biogeography of the Pacific Northwest has been heavily influenced by the last Pleistocene glaciation, which reached a maximum as late as 14,000 yr bp. We researched: (1) what type of population structure is present for garter snakes and newts, (2) whether the population structure of these species is consistent with a Pleistocene glaciation hypothesis, and (3) how population structure and migration possibly affect co‐evolution between these species. Location The Pacific Northwest of North America, specifically northern California, Oregon and Washington in the USA. Methods We sampled approximately 20 populations for each species from three different transects. Using microsatellite markers and tissue samples from both species, we quantified the population structure for both species. Individual‐based assignment tests were used to estimate contemporary migration rates. Results Both Th. sirtalis and Ta. granulosa exhibited little genetic differentiation among our study sites, even among those separated by large distances. Significant population structure was detected on multiple geographic scales. Differences in population structure were observed among transects and between garter snake and newt transects. Contemporary migration rate estimates indicate high levels of genetic exchange between populations. Main conclusions Prior to this study, little was known about the fine‐scale population structure of either species in this region. Patterns of population structure for garter snakes and newts reflect a shared biogeographical history affected by the Pleistocene glaciation in the Pacific Northwest. Both species apparently migrate frequently between populations, thus potentially retarding the process of adaptive co‐evolution. We find that populations from a northern coastal transect (Washington) are most likely to be locally adapted.

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Deglaciation and Postglacial Vegetation History of the West Mountains, West-central Idaho, U.S.A.

Cited by 11 publications

References 23 publications

Elevation‐dependent responses of streamflow to climate warming

Elevation‐dependent responses of streamflow to climate warming

Deglaciation and postglacial treeline fluctuation in the northern San Juan Mountains, Colorado

Patterns of genetic differentiation in Thamnophis and Taricha from the Pacific Northwest

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