Biogeography of rare lichens from the coast of Oregon (original) (raw)

Lichens from the South Slough and Horsfall Dunes on the Southern Oregon Coast

Evansia, 2011

Several notable lichens were found in the South Slough area near Coos Bay, Oregon, on a foray sponsored by the Northwest Lichenologists. A new record for Bryoria bicolor extends its southern range on the Pacific coast of North America, and information is presented on several other species, including Scoliciosporum sp., a little-reported, undescribed epiphyllous lichen.

Lichen ecology and diversity of a sagebrush steppe in Oregon: 1977 to the present

North American Fungi

We present a lichen checklist of 141 species from the Lawrence Memorial Grassland Preserve and nearby lands in Wasco County, Oregon, based on collections made in the 1970s and 1990s. Collections include epiphytic, lignicolous, saxicolous, muscicolous, and terricolous species. One of these collections is the type specimen for a recently described species, Placopyrenium conforme. To evaluate differences between collections made in the 1970s and 1990s, taxa are placed in six morphological groups: crustose, foliose, fruticose, squamulose, stratified nitrogen-fixers, and gelatinous nitrogen-fixers. We determined that recent visits to the preserve added a greater proportion of terricolous species to the list than species from other substrates, reflecting developments in the taxonomy and understanding of biological soil crusts over recent decades. The trade-off between smaller-scale study plots that capture accurate species abundance and larger plots that capture more complete species rich...

Lichens from the Matterhorn and Ice Lake, Northeastern Oregon

Evansia, 2007

A backpack trip to Ice Lake (2435 m) and the summit of the Matterhorn (2995 m) in the Wallowa Mountains in Oregon sponsored by Northwest Lichenologists resulted in numerous interesting finds, including several rare species and new state records. Caloplaca oblongula, C. saxifragarum, Cephalophysis leucospila, Dermatocarpon polyphyllizum, Farnoldia micropsis, and Solorina spongiosa are apparently new to Oregon. Many of the calciphiles found in this area on marble have seldom been reported from Oregon.

An Important Lichen of Southeastern Montana Rangelands

Journal of Range Management, 1983

The lichen (Parmelia chlorochroa) was most abundant in sagebrush and grassland vegetation associations, less so in the pine, and absent in riparian types. It was significantly associated with drier sites and bare ground. Lichens appear to have value in reducing erosion, as indicators of intensive grazing, and in contributing to the nutrient quality of soils.

Oregon Plants , Oregon Places : Gearhart Mountain Wilderness

2007

17 Palisade Rocks consist of porphyritic lava rock weathered into a variety of fascinating shapes. Photo taken at 6,500 feet elevation by Ron Larson. Gearhart Mountain, a b road shou lde red giant on the border between Klamath and Lake counties, lures me each July to explore the pristine meadows located on its east flank, seeking further discoveries among the abundant wildflowers. Gearhart Mountain, located about 12 miles northeast of Bly, forms part of the watershed boundary between the Klamath and Chewaucan drainages. It lies within the Fremont-Winema National Forest. Higher areas of the mountain (above 6,300 ft.) received wilderness designation in 1964, with additional lands added in 1984, bringing the current Wilderness total to 22,800 acres. The mountain was named for the Gearhart family, local ranchers who lived in the area in the 1870s (McArthur 1982). During WWII the Mitchell family was picnicking near the southern base of the mountain. They died when a Japanese fire balloon...

Lichenometric Dating of Rock Surfaces in the Northern Cascade Range, USA

Geografiska Annaler: Series A, Physical Geography, 2013

This study presents a growth curve developed from direct and indirect growth rates of Rhizocarpon geographicum lichens from study sites on Mounts Baker, Rainier, Adams, and Hood in the northern Cascade Range of the western USA. Our observations of direct growth rates are based on 31 measurements of 11 lichens growing on different surfaces. This direct growth rate dataset is complemented by indirect growth rates based on measurements of the largest lichen observed on 20 different surfaces over 24-33-yr periods. The direct and indirect datasets produce statistically indistinguishable mean radial growth rates of 0.48 and 0.50 mm yr −1 , respectively. Statistical analysis of zero and first order fits of our growth rate data suggests that lichen growth is best characterized by the average of our mean growth rate (zero order) models at 0.49 mm yr −1 . Our revised growth curve for the study area extends the applicable range for dating rock surface in the study area to the seventeenth century, approximately 175 years longer than previous calibrated curves.

The Lichen Flora of the Caliente Field Office Lincoln County, Nevada

Report to the Nevada Bureau of Management, 2019

Lichens form a conspicuous and diverse biota in the Caliente Field Office (CFO). Their varied colors can be seen on the cliffs along the highway through Rainbow Canyon and on boulders and junipers along mountain biking trails. Recently a trail in Cedar City, Utah was even named for its lichens (Miller 2015). Prior to surveys by the authors and colleagues in Great Basin National Park (Carter et al. 2019), no full-scale inventory of lichens had been conducted in the Great Basin Desert. Floristic lichen inventories have been conducted in the Mojave (Knight et al. 2002, Sweat et al. 2004, Jackson et al. 2005, Knudsen et al. 2013, Proulx and St. Clair 2013, Proulx et al. 2016) but this is the first study to survey the lichen flora of the Mojave and Great Basin along an ecotonal gradient. This report and anno- tated checklist are the product of three years of field work carried out in the CFO from 2016 to 2018. Specimens from these surveys are deposited at the Brigham Young University Herbarium of Non-Vas- cular Cryptogams (BRY-C). This work establishes a robust baseline of lichen diversity for the CFO. A total of 361 taxa of lichens, 57 lichenicolous fungi and 3 allied fungi are reported from the field office. Twelve species are new reports for North America (Arthonia hertelii, Ascochyta candelariellicola, Caloplaca teicholyta, Cercidospora melanophthalmae, Endococcus karlstadtensis, Lawalreea lecanorae, Lichenochora epinashii, Lichenostigma gracilis, L. triseptatum, Megaspora rimisorediata, Polycoccum evae and Psorotichia numidella var. flageyna). An additional 56 species of lichens and 46 species of licheni- colous fungi, many probably new to science, are discussed and require further study. This report pro- vides an annotated checklist of the currently documented lichen flora of the Caliente Field Office and Basin and Range National Monument, including distribution, habitat, substrate preferences and conser- vation status for each species. Rare species and habitats are discussed, and detailed notes are provided for species ranked as critically imperiled (S1 rank). This report is accompanied by a field guide that includes photographs and field identification notes for over 180 common lichen species of the Great Basin Desert. The highest diversity of lichens in the CFO is found on high-elevation mountain peaks, especially Highland Peak, which also hosts a diverse, closed canopy, mesic forest of White Fir and actively recruiting Bristlecone Pines. While high-elevation sites are per unit area the richest, Pinyon–Juniper woodlands host the most diverse assemblage of lichen species. The northeastern portion of the Mojave hosts an unusual species assemblage, potentially owing to its location in the ecotone of three floristic regions: Mojave, Great Basin and Colorado Plateau. As evidence mounts demonstrating that the southern Great Basin biota is at high risk of climate change impacts (Bradley 2010, Still and Richardson 2015), of primary interest is whether lichens can be utilized as early-warning bioindicators of climate change (Root et al. 2014). Candidate bioindicator species are presented and preliminary species distribution and local conservation status is given for each species. Further research is required in order to build upon this robust baseline and create a suite of tools useful for land management, including field-testing monitoring methods, and implementing long-term monitoring plots for candidate bioindicator species.