A5059964164- Lichen and fungal ecology
- Bryophyte Studies and Records
- Biocrusts and Microbial Ecology
- Botany and Plant Ecology Studies
- Plant and animal studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Botany, Ecology, and Taxonomy Studies
- Algal biology and biofuel production
- Polar Research and Ecology
- Photosynthetic Processes and Mechanisms
- Plant Stress Responses and Tolerance
- Space Science and Extraterrestrial Life
- Peatlands and Wetlands Ecology
- Plant Water Relations and Carbon Dynamics
- Plant Parasitism and Resistance
- Wildlife Ecology and Conservation
- Dark Matter and Cosmic Phenomena
- Health, Environment, Cognitive Aging
- Fish Ecology and Management Studies
- Plant-Microbe Interactions and Immunity
- Ecosystem dynamics and resilience
- Ecology and biodiversity studies
- Species Distribution and Climate Change
- Plant Reproductive Biology
- Ecology and Vegetation Dynamics Studies
California State University Los Angeles
2011-2025
National Evolutionary Synthesis Center
2007-2008
University of California, Berkeley
2006-2007
Museum of Vertebrate Zoology
2006
Metagenomes encode an enormous diversity of proteins, reflecting a multiplicity functions and activities
Summary With global climate change, water scarcity threatens whole agro/ecosystems. The desert moss Syntrichia caninervis , an extremophile, offers novel insights into surviving desiccation and heat. sequenced S. genome consists of 13 chromosomes containing 16 545 protein‐coding genes 2666 unplaced scaffolds. Syntenic relationships within the S . Physcomitrella patens genomes indicate has undergone a single duplication event (compared to two for P. ) evidence suggests chromosomal or...
Introduction Half a century since the creation of International Association Bryologists, we carried out review to identify outstanding challenges and future perspectives in bryology. Specifically, have identified 50 fundamental questions that are critical advancing discipline.Methods We adapted deep-rooted methodology horizon scanning key research foci. An initial pool 258 was prepared by multidisciplinary international working group 32 bryologists. A series online surveys completed broader...
PREMISE OF RESEARCH: Natural populations of many mosses appear highly female‐biased based on the presence reproductive structures. This bias could be caused by increased male mortality, lower growth rate, or a higher threshold for achieving sexual maturity in males. Here we test these hypotheses using samples from two Mojave Desert moss Syntrichia caninervis . METHODS: We used double‐digest restriction‐site associated DNA (RAD) sequencing to identify candidate sex‐associated loci panel...
PREMISE Desiccation tolerance (DT) is a widespread phenomenon among land plants, and variable ecological strategies for DT are likely to exist. Using Syntrichia caninervis , dryland moss model system used in studies, we hypothesized that lowest juvenile (protonemal) tissues, highest asexual reproductive propagules (gemmae), intermediate adults (shoots). We tested the long‐standing hypothesis of an inherent constitutive strategy this species. METHODS Plants were rapidly dried levels...
Biodiversity describes the variety of life and may influence properties processes ecosystems, such as biomass production resistance to disturbance. We investigated effects multiple facets biodiversity – species richness composition community, intraspecific diversity in two key on both experimentally‐assembled biological soil crusts (biocrusts). found that productivity was most strongly influenced by community (variation presence relative proportions members), weakly positively richness....
Several species of dryland cyanobacteria are known to occur as hypoliths under semi-translucent rocks. In the Mojave Desert, these organisms find refuge from intense solar radiation milky quartz where moisture persists for a longer period time than in adjacent soil surface habitat. Desert mosses, which extremely desiccation-tolerant, can also hypolithic spaces, though little is about this unique moss microhabitat and how composition compares that communities. To address question, we deployed...
Climate change is expanding drylands even as land use practices degrade them. Representing ∼40% of Earth's terrestrial surface, rely on biological soil crusts (biocrusts) for key ecosystem functions including stability, biogeochemical cycling, and water capture. Understanding how biocrusts adapt to climate critical understanding dryland ecosystems will function with altered climate. We investigated the sensitivity experimentally imposed novel climates track changes in productivity stability...
Premise of research. If sexual reproduction is necessary for maintaining genotypic diversity, then plant populations lacking sex might be expected to exhibit less diversity than sexually reproducing populations. This pattern could particularly pronounced in mosses harsh environments, where haploid gametophytes persist the apparent absence sex, presumably through vegetative cloning. Here we compare genetic four Mojave Desert moss Syntrichia caninervis assess degree which associated with...
In dioicous mosses, sex is determined by a single U (female, ♀) or V (male, ♂) chromosome. Although 1 : ratio expected following meiosis, phenotypic ratios based on the production of gametangia are often female-biased. The dryland moss Syntrichia caninervis (Pottiaceae) notable for its low frequency expression and strong female bias. Here we present technique to determine genotypic in shoot S. caninervis, report results case study examining ratios.We reanalyzed 271 non-expressing gametophyte...
The California Phenology Thematic Collections Network (CAP TCN) is a collaborative project that seeks to maximize the value of herbarium specimens and their data, especially for understanding changes in plant phenology due anthropogenic climate change. unites personnel herbaria at universities, research stations, natural history museums, botanic gardens with goal capturing images, transcribing label producing georeferenced coordinates nearly one million preserved collected over past 150+...
Biocrust communities are often heterogeneous and affected by small-scale physical environmental factors. The presence of moss in biocrusts, for example, is likely to create a set conditions distinct from those found biocrusts that lack mosses. Similarly, hypolithic organisms living under on the belowground surface translucent opaque stones (typically quartz) experience environment relative surrounding soil organisms. To understand impact these factors biocrust bacterial community...
Abstract Here I present a cladistically based monograph of group closely related mosses known as the Syrrhopodon involutus complex. Monographs remain critical and indispensable component systematics, but traditional monographic practices require some revisions if modern monographs are to truly reflect incorporate phylogenetic understanding. summarize methods used address issues relating sampling formation OTUs for this monograph, emphasize importance incorporating morphological character...
The Calymperaceae are a large pantropical moss clade. This paper reports the results of phylogenetic analysis Calymperaceae, with an emphasis on relationships and putatively polyphyletic Syrrhopodon. Two chloroplast genes, rps4 trnL, part nuclear encoded gpd, morphological characters were analyzed individually in combination. total-evidence tree was used to construct rank-free classification following guidelines current draft PhyloCode. cladistic supports monophyly Calymperes Mitthyridium,...
Desiccation tolerance is a complex trait that broadly but infrequently present throughout the evolutionary tree of life. has played significant role in land plant evolution, both vegetative and reproductive life history stages. In plants, late embryogenesis abundant (LEA) gene families are involved abiotic stress development propagules. They also major component desiccation tolerance. Phylogenies were estimated for four LEA genes from Arabidopsis, Physcomitrella, tolerant plants Tortula...
In seed plants, populations located at the margins of species distributions are often characterized by reduced sexual reproduction and an increased reliance asexual reproduction. The degree to which this pattern applies reproductive traits in haploid–dominant, non–seed plants was assessed Syrrhopodon involutus Schwaeg complex, a group closely related tropical mosses with unisexual gametophytes. second internal transcribed spacer (ITS2) nuclear ribosomal DNA sequenced for samples from...
Biological soil crusts (biocrusts) are widespread in drylands and deserts. At the microhabitat scale, they also host hypolithic communities that live under semitranslucent stones. Both environmental niches experience exposure to extreme conditions such as high UV radiation, desiccation, temperature fluctuations, resource limitation. However, somewhat protected from extremes relative biocrust communities. Conditions otherwise similar, so comparing them can answer outstanding questions...
The effects of severe drought on the stability dryland ecosystems are still uncertain and it is unknown whether diversity can buffer changes in systems that adapted to water-limitation. We investigated long-term induced composition maturity biological soil crusts (biocrusts), as well tested hypothesis promotes using compositional resistance a measure for ecosystem stability. surveyed an array 25 sites central Colorado Plateau, USA, included plots received ambient precipitation had...
Abstract Several species of dryland cyanobacteria are known to occur as hypoliths under semi-translucent rocks. In the Mojave Desert, these organisms find refuge from intense solar radiation milky quartz where moisture persists for a longer period time than in adjacent soil surface habitat. Desert mosses, which extremely desiccation-tolerant, can also hypolithic spaces, though little is about this unique moss microhabitat and how composition compares that communities. To address question, we...
ABSTRACT Premise of research: Natural populations many mosses appear highly female-biased based on the presence reproductive structures. This bias could be caused by increased male mortality, lower growth rate, or a higher threshold for achieving sexual maturity in males. Here we test these hypotheses using samples from two Mojave Desert moss Syntrichia caninervis. Methods: We used double digest restriction-site associated DNA (RAD) sequencing to identify candidate sex-associated loci panel...