Wetland determination of a southeast Oregon vernal pool and management implications

Clausnitzer, David; Huddleston, J. H.

doi:10.1672/0277-5212(2002)022[0677:wdoaso]2.0.co;2

Cited by 5 publications

(5 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Degree of water logging was the most important factor explaining variation in grass species in a European mesic grassland (Silvertown et al, 1999 ). Similarly, vegetation composition is strongly influenced by length of inundation time during the growing season in semi‐arid and arid grass and shrublands (Clausnitzer & Huddleston, 2002 ; Dippenaar, 2014 ; Gibson et al, 2005 ; Keeley & Zedler, 1998 ). Temporarily flooded soils (e.g., vernal pools or waterlogged soil at or near the surface) are ubiquitous in arid and semi‐arid regions with wet winters, dry summers, and perched water tables over impervious substratum such as in the interior Pacific Northwest, California, Australia, Chile, Middle East, Spain, and Africa (Clausnitzer & Huddleston, 2002 ).…”

Section: Discussionmentioning

confidence: 99%

“…Similarly, vegetation composition is strongly influenced by length of inundation time during the growing season in semi‐arid and arid grass and shrublands (Clausnitzer & Huddleston, 2002 ; Dippenaar, 2014 ; Gibson et al, 2005 ; Keeley & Zedler, 1998 ). Temporarily flooded soils (e.g., vernal pools or waterlogged soil at or near the surface) are ubiquitous in arid and semi‐arid regions with wet winters, dry summers, and perched water tables over impervious substratum such as in the interior Pacific Northwest, California, Australia, Chile, Middle East, Spain, and Africa (Clausnitzer & Huddleston, 2002 ). Researchers have identified the importance of temporary water inundation to support specialized vegetation communities as well as a need to better understand such patterns for conservation of biodiversity in arid and semi‐arid ecosystems (Clausnitzer & Huddleston, 2002 ; Dippenaar, 2014 ; Keeley & Zedler, 1998 ).…”

Section: Discussionmentioning

confidence: 99%

“…Temporarily flooded soils (e.g., vernal pools or waterlogged soil at or near the surface) are ubiquitous in arid and semi‐arid regions with wet winters, dry summers, and perched water tables over impervious substratum such as in the interior Pacific Northwest, California, Australia, Chile, Middle East, Spain, and Africa (Clausnitzer & Huddleston, 2002 ). Researchers have identified the importance of temporary water inundation to support specialized vegetation communities as well as a need to better understand such patterns for conservation of biodiversity in arid and semi‐arid ecosystems (Clausnitzer & Huddleston, 2002 ; Dippenaar, 2014 ; Keeley & Zedler, 1998 ). Relationships between temporary flooding of arid and semi‐arid soils and plant community dynamics have been largely unexplored in Pacific Northwest steppe and bunchgrass ecosystems (Clausnitzer & Huddleston, 2002 ).…”

Section: Discussionmentioning

confidence: 99%

“…Researchers have identified the importance of temporary water inundation to support specialized vegetation communities as well as a need to better understand such patterns for conservation of biodiversity in arid and semi‐arid ecosystems (Clausnitzer & Huddleston, 2002 ; Dippenaar, 2014 ; Keeley & Zedler, 1998 ). Relationships between temporary flooding of arid and semi‐arid soils and plant community dynamics have been largely unexplored in Pacific Northwest steppe and bunchgrass ecosystems (Clausnitzer & Huddleston, 2002 ). Our finding that water drainage is the dominant gradient related to forb composition variation in our study area combined with a general lack of forb‐focused research in grasslands globally (Bråthen et al, 2021 ; Pokorny et al, 2004 ; Siebert & Dreber, 2019 ) suggests that successful management of diverse forb communities in the PNB and similar semi‐arid and arid grasslands with wet winters and summer drought requires increased understanding of interactions between soil hydrologic characteristics and forb community dynamics.…”

Section: Discussionmentioning

confidence: 99%

See 3 more Smart Citations

Forb composition gradients and intra‐annual variation in a threatened Pacific Northwest Bunchgrass Prairie

Averett

Endress

2022

Ecology and Evolution

View full text Add to dashboard Cite

Grasslands are among the most threatened and least protected terrestrial biome. Grassland forbs: (1) account for most of the floral diversity; (2) are not well studied because they have been overshadowed by grass‐centered research; and (3) have been a major source for biodiversity loss. The Pacific Northwest Bunchgrass Prairie (PNB) of North America is one of the most endangered grasslands on earth. Knowledge of vegetation community dynamics in the PNB is based primarily on bunchgrasses. There is a paucity of information related to the PNB's diverse native perennial forbs (hereafter “forbs”). Consequently, PNB forb community patterns and dynamics are largely unknown. We describe forb community structure and its relationship to environmental factors and phenology. We sampled 29 plots in the Starkey Experimental Forest and Range, northeastern Oregon, at three different times during 2016 (April; May; July). Nonmetric multidimensional scaling (NMS) indicated that the dominant gradient in forb composition was related ( R 2 = 0.66) to slope and soil P and K, contrasting flat, poorly drained soils (scabflats) at one end with steep, well‐drained soils at the other end. The secondary gradient ( R 2 = 0.16) contrasted deeper, finer textured soils at one end with shallow, rocky soils at the other. Forb richness decreased by ~40% from April to July. NMS and Indicator Species Analysis (ISA) showed that most forbs had affinities toward spring. Ubiquitous forbs (e.g., Triteleia grandiflora , Camassia quamash ) were sparse to absent by July. Contradictory to general descriptions of the PNB, forb cover and richness in drought‐prone sites were comparable to mesic sites when spring data were considered. Our findings suggest that PNB grasslands contain diverse forb communities that are structured primarily by water drainage and soil depth. Conventional sampling concomitant with peak grass biomass is insufficient to characterize PNB forb communities, particularly for scabflats and the most drought‐prone soils.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Forb composition gradients and intra‐annual variation in a threatened Pacific Northwest Bunchgrass Prairie

Averett

Endress

2022

Ecology and Evolution

View full text Add to dashboard Cite

show abstract

“…The spatial extent, temporal duration, and concentration of soil moisture are three key components of dryland playa hydropatterns that directly control microbial and floral biodiversity and community functioning in these environments [3,4]. Insight into soil moisture control of biological community functioning is essential information used to inform wilderness management decisions concerning these fragile desert ecosystems [5,6].…”

Section: Introductionmentioning

confidence: 99%

Remote Soil Moisture Measurement from Drone-Borne Reflectance Spectroscopy: Applications to Hydroperiod Measurement in Desert Playas

Levy

Johnson

2021

Remote Sensing

View full text Add to dashboard Cite

The extent, timing, and magnitude of soil moisture in wetlands (the hydropattern) is a primary physical control on biogeochemical processes in desert environments. However, determining playa hydropatterns is challenged by the remoteness of desert basin sites and by the difficulty in determining soil moisture from remotely sensed data at fine spatial and temporal scales (hundreds of meters to kilometers, and hours to days). Therefore, we developed a new, reflectance-based soil moisture index (continuum-removed water index, or CRWI) that can be determined via hyperspectral imaging from drone-borne platforms. We compared its efficacy at remotely determining soil moisture content to existing hyperspectral and multispectral soil moisture indices. CRWI varies linearly with in situ soil moisture content (R2 = 0.89, p < 0.001) and is comparatively insensitive to soil clay content (R2 = 0.4, p = 0.01), soil salinity (R2 = 0.82, p < 0.001), and soil grain size distribution (R2 = 0.67, p < 0.001). CRWI is negatively correlated with clay content, indicating it is not sensitive to hydrated mineral absorption features. CRWI has stronger correlation with surface soil moisture than other hyperspectral and multispectral indices (R2 = 0.69, p < 0.001 for WISOIL at this site). Drone-borne reflectance measurements allow monitoring of soil moisture conditions at the Alvord Desert playa test site over hectare-scale soil plots at measurement cadences of minutes to hours. CRWI measurements can be used to determine surface soil moisture at a range of desert sites to inform management decisions and to better reveal ecosystem processes in water-limited environments.

show abstract

Wetland Identification and Boundary Delineation Methods

Tiner¹

2016

Wetland Indicators

View full text Add to dashboard Cite

Wetland determination of a southeast Oregon vernal pool and management implications

Cited by 5 publications

References 7 publications

Forb composition gradients and intra‐annual variation in a threatened Pacific Northwest Bunchgrass Prairie

Forb composition gradients and intra‐annual variation in a threatened Pacific Northwest Bunchgrass Prairie

Remote Soil Moisture Measurement from Drone-Borne Reflectance Spectroscopy: Applications to Hydroperiod Measurement in Desert Playas

Wetland Identification and Boundary Delineation Methods

Contact Info

Product

Resources

About