Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Devonian (3)
- Biodiversity (2)
- California (2)
- Fossil (2)
- Lichens (2)
-
- Northern California (2)
- Pacific Northwest (2)
- Plants (2)
- Prescribed fire (2)
- Restoration (2)
- Alnus rubra (1)
- Ammophila arenaria (1)
- Anatomy (1)
- Aneurophytales (1)
- Arcata California. (1)
- Arctostaphylos uva-ursi (1)
- Bacteria (1)
- Bacterial nitrogen cycling (1)
- Baduwa't (1)
- Bark leachate (1)
- Barnyard grass (1)
- Biogeography (1)
- Biomass (1)
- Black grama (1)
- Bonanza (1)
- Botany (1)
- Bouteloua eriopoda (1)
- Canada (1)
- Canada thistle (1)
- Canopy closure (1)
- Publication Year
- Publication
- Publication Type
Articles 1 - 30 of 127
Full-Text Articles in Life Sciences
Belowground Plant Communities: Seed Bank Dynamics And Relationship To Aboveground Vegetation In Grazing Allotment Of Klamath County, Oregon, Dellaina C. Morse, Scott M. Estepa
Belowground Plant Communities: Seed Bank Dynamics And Relationship To Aboveground Vegetation In Grazing Allotment Of Klamath County, Oregon, Dellaina C. Morse, Scott M. Estepa
Environmental Science & Management Senior Capstones
Seed banks are valuable resources for restoration but are understudied. The species present in the aboveground composition influence the seed bank through seed inputs. Land managers utilize herbicides to selectively reduce certain species in the above- and belowground composition. The aim of this paper is to observe and assess the species present in a seed bank post-herbicide application, and to discuss the seed bank potential for future restoration at the specific site in Klamath County, Oregon. Soil core samples were collected in the field and brought to the lab where they were processed and prepared for germination. We watered and …
Prevalence Of Hesperevax Sparsiflora Var. Brevifolia (Short-Leaved Evax) At Ocean Ranch, Humboldt County, California: Exploring The Effects Of Disturbance, Shelby Diquirco, Matthew Estrada, Alana T. Fraley, Alexander D. Smith
Prevalence Of Hesperevax Sparsiflora Var. Brevifolia (Short-Leaved Evax) At Ocean Ranch, Humboldt County, California: Exploring The Effects Of Disturbance, Shelby Diquirco, Matthew Estrada, Alana T. Fraley, Alexander D. Smith
Environmental Science & Management Senior Capstones
The prevalence of special-status plants within a landscape can be an indicator of the ecological health of that site, and therefore inform restoration efforts and post-restoration monitoring. Hesperevax sparsiflora var. brevifolia (short-leaved evax) is a special status species found within the Ocean Ranch unit of Humboldt, California. A primary threat to native plant communities are invasive plant species. Coastal dune ecosystems are largely dominated by invasive species, including Ammophila arenaria (European beachgrass). To work towards the eradication of A. arenaria, the California Department of Fish and Wildlife utilized treatment combinations of herbicide and prescribed fire at Ocean Ranch in …
Assessing The Recovery Of Forest Understory Vegetation After Clearcut Logging Across A 445-Year Chronosequence, Molly Smith Metok
Assessing The Recovery Of Forest Understory Vegetation After Clearcut Logging Across A 445-Year Chronosequence, Molly Smith Metok
Cal Poly Humboldt theses and projects
The conversion of natural forested lands to managed forests has reduced the amount of older, structurally diverse forests worldwide. In conifer forests of the Pacific Northwest (USA) – where the understory plant communities comprise only 1% of forest biomass but represent 90% of the plant species richness – the long-term impacts of timber harvesting are not fully understood. I used a chronosequence of forests in southwestern Oregon that ranged from 25 to 445 years of age to compare changes in plant communities in logged (i.e., managed) stands with that of stands in late succession and old growth conditions. The chronosequence …
A Cladoxylopsid With Complex Vascular Architecture From The Early Devonian Battery Point Formation (Québec, Canada), Jessica Chu
A Cladoxylopsid With Complex Vascular Architecture From The Early Devonian Battery Point Formation (Québec, Canada), Jessica Chu
Cal Poly Humboldt theses and projects
Cladoxylopsids are seed-free plants that formed the world’s earliest forests and gave rise to horsetails (sphenopsids), but their evolutionary origins are poorly understood. Here, I describe a new Early Devonian cladoxylopsid from the Emsian (400-395 Ma) Battery Point Formation (Québec, Canada). The structural features of this plant indicate taxonomic affinity to cladoxylalean cladoxylopsids and its phylogenetic position supports placement in genus Cladoxylon (the proposed name, Cladoxylon kespekianum sp. nov., to be formalized by peer-reviewed publication). Specimens of this plant are permineralized in calcium carbonate and were studied using the acetate peel technique with light and electron microscopy. Cladoxylon kespekianum is …
Treatment Plan And Educational Guide For Removing Invasive Barnyard Grass, Canada Thistle, And Cocklebur Within The Baduwa't (Mad River) Estuary, Ashley S. Turner, Alex D. Lallman
Treatment Plan And Educational Guide For Removing Invasive Barnyard Grass, Canada Thistle, And Cocklebur Within The Baduwa't (Mad River) Estuary, Ashley S. Turner, Alex D. Lallman
Cal Poly Humboldt Capstone Honor Roll
Our project is located at the Baduwa’t Estuary. We partnered with CalTrout to assist them with meeting one of the objectives for their Mad River (Baduwa’t) Estuary Floodplain Habitat and Public Access Enhancement Project. CalTrout partnered with the landowner, McKinleyville Community Services District, to restore 4.25 acres of the estuary. Our project focused on reducing the abundance of invasive plant species within the estuary area. The target plant species were barnyard grass, Canada thistle, and cocklebur. First, we conducted a literature review to learn the best management practices for eradicating the three target species. Then we conducted a field survey …
Macrolichen Inventory Of The Horse Mountain Botanical Area, Six Rivers National Forest, California, Usa, Sarah Norvell Conway
Macrolichen Inventory Of The Horse Mountain Botanical Area, Six Rivers National Forest, California, Usa, Sarah Norvell Conway
Cal Poly Humboldt theses and projects
Macrolichen diversity and community composition was determined for an area of high botanical interest in the Coast Ranges of Northern California – the Horse Mountain Botanical Area (HMBA) in Six Rivers National Forest. The Coast Ranges have been suggested to have high epiphytic macrolichen diversity, yet detailed site-specific macrolichen surveys are lacking for the area. Here we present comprehensive data on macrolichens of the HMBA integrated with environmental metadata at the landscape level. Twenty 0.4 ha sampling plots were positioned across the varying habitats of the HMBA and macrolichens were intensively sampled from all substrata. Out of 888 total collections, …
Changes And Relationships Of Soil Aluminum, Organic Matter, And Hydrogen Ion Concentration With Rye Cover Crop, Arron Wilder
Changes And Relationships Of Soil Aluminum, Organic Matter, And Hydrogen Ion Concentration With Rye Cover Crop, Arron Wilder
Cal Poly Humboldt theses and projects
Soil acidity is a common agricultural problem worldwide, as approximately 50% of all potentially arable soils are affected by pH limitations. At soil pH 3+) is considered to be the chemical form of aluminum in acid soil that hinders plant growth the most. Potentially, soil organic matter (SOM) can ameliorate the toxic effects of Al3+ on plants and microbes by binding with Al3+, thus preventing Al3+ (and other species of aluminum) from interacting in the rhizosphere. Increasing SOM also increases soil health indicators (i.e., microbial activity, soil water holding capacity, aggregate stability, porosity, etc.) while the …
Benefits Of Cover Cropping Systems In Walnut Orchards As Sustainable Agricultural Practice, Ana Medic, Consuelo B. Baez Vega
Benefits Of Cover Cropping Systems In Walnut Orchards As Sustainable Agricultural Practice, Ana Medic, Consuelo B. Baez Vega
CSU Journal of Sustainability and Climate Change
In recent years walnut orchards implemented cover crops in between rows to improve soil’s quality, lessen soil’s erosion, increase organic matter, manage nutrient movement and availability, enhance water retention, and expand microbe, insect, and flora diversity. Commonly selected cover crops in California are from families Poaceae, Brassicaceae, and Fabaceae. Considerations should be made when choosing a particular cover crop mixture to enhance multiple benefits and improve sustainable practices in orchard settings. An experiment was conducted in a walnut orchard to compare functionality and benefits of three systems multi-crop, monocrop, and no vegetation cover crop system. The following components were evaluated: …
Degradation And Nitrogen Cycling In The Context Of Biodiversity-Ecosystem Function Relationships In The Inquiline Bacterial Community Of Darlingtonia Californica, Megan Teigen
Cal Poly Humboldt theses and projects
Biodiversity-ecosystem function (BEF) research aims to explain how species and their environments interact with each other. Microbial communities engage in vital biogeochemical pathways in a variety of natural ecosystems, and yet there are large knowledge gaps about the specific metabolic pathways in which they are involved. Degradation specifically contributes to nitrogen cycling globally through the breakdown of large organic nitrogen compounds into small inorganic nitrogen that is necessary for the survival of many other organisms. In this study, I focused on the degradative function of the inquiline microbial communities found within the carnivorous pitcher plant, Darlingtonia californica. Darlingtonia grows in …
Forecasting The Outcomes Of Managing A Rare Endemic Plant At Its Elevational Limit Under Climate Change Scenarios, Ethan Reibsome
Forecasting The Outcomes Of Managing A Rare Endemic Plant At Its Elevational Limit Under Climate Change Scenarios, Ethan Reibsome
Cal Poly Humboldt theses and projects
Lupinus constancei (Lassics lupine) is an exceptionally rare forb with a population that in 2020 consisted of 1,300 individuals located on two adjacent mountaintops in northwestern California, USA. Past work has demonstrated the species is threatened by high levels of seed predation by small mammals, which is likely the result of fire exclusion and the subsequent vegetation encroachment that both increases small mammal habitat and directly reduces suitable habitat for the species. Because of this, active management through caging of reproductive individuals to reduce seed consumption has been conducted every year since 2003. In addition, growing season temperatures have increased …
Mechanically Injurious Plants, James P. Smith Jr
Mechanically Injurious Plants, James P. Smith Jr
Botanical Studies
No abstract provided.
Two Hemlocks, James P. Smith Jr
Richard Evans Schultes, James P. Smith Jr
Purposeful Use Of Poisonous Plants, James P. Smith Jr
Purposeful Use Of Poisonous Plants, James P. Smith Jr
Botanical Studies
No abstract provided.
Poisonous Plants: A Glossary Of Commonly Used Terms, James P. Smith Jr
Poisonous Plants: A Glossary Of Commonly Used Terms, James P. Smith Jr
Botanical Studies
No abstract provided.
Poisonous Plants Of Home And Garden, James P. Smith Jr
Poisonous Plants Of Home And Garden, James P. Smith Jr
Botanical Studies
No abstract provided.
Food Plants With Toxic Properties, James P. Smith Jr
Food Plants With Toxic Properties, James P. Smith Jr
Botanical Studies
No abstract provided.
An Annotated List Of The Poisonous And Injurious Vascular Plants Of The United States, James P. Smith Jr
An Annotated List Of The Poisonous And Injurious Vascular Plants Of The United States, James P. Smith Jr
Botanical Studies
No abstract provided.
Nikolai Ivanovich Vavilov, James P. Smith Jr
Effects Of Redwood Bark And Leaf Leachate On Different Lichen Populations Found Within The Redwood Forest Of Arcata, Ca, Courtney Michelle Harris, Phoebe Hughes
Effects Of Redwood Bark And Leaf Leachate On Different Lichen Populations Found Within The Redwood Forest Of Arcata, Ca, Courtney Michelle Harris, Phoebe Hughes
IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt
No abstract provided.
Derivation Of The Generic Names Of North American Grasses (Names In Current Or Recent Use), James P. Smith Jr
Derivation Of The Generic Names Of North American Grasses (Names In Current Or Recent Use), James P. Smith Jr
Botanical Studies
No abstract provided.
Conifer Encroachment And Removal In A Northern California Oak Woodland: Influences On Ecosystem Physiology And Biodiversity, Gabriel S. Goff
Conifer Encroachment And Removal In A Northern California Oak Woodland: Influences On Ecosystem Physiology And Biodiversity, Gabriel S. Goff
Cal Poly Humboldt theses and projects
Oregon white oak (Quercus garryana) woodlands across their range are becoming increasingly threatened by encroaching Douglas-fir encroachment (Pseudotsuga menziesii) as a result of fire exclusion. Using water potential (Ψ), stomatal conductance (gs), xylem water stable isotopes (dD), and three metrics of biodiversity, this study investigates the effects of conifer encroachment and removal at the ecosystem-scale. The study was set in an Oregon white oak woodland in northern California and compared three levels of encroachment before and after conifer removal. Findings indicate that heavily encroached stands have the least amount of water stress and gas …
Exploration Of Antiviral Effects Of Rna-Dependent Rna Polymerases 3, 4 And 5 In Arabidopsis., Eli R. Kallison, Aleksandra Beric, Blake Meyers
Exploration Of Antiviral Effects Of Rna-Dependent Rna Polymerases 3, 4 And 5 In Arabidopsis., Eli R. Kallison, Aleksandra Beric, Blake Meyers
IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt
Small RNAs play a number of vital roles in plants, including viral resistance. A particular class of small RNA that regulates plant defense from pathogens, among other functions, is known as small interfering RNAs (siRNAs). A key player in the biogenesis pathway of siRNAs are RNA-Dependent RNA Polymerases (RDRs). There are six RDR proteins in Arabidopsis thaliana, three of which have well documented roles (RDRs 1, 2 and 6), and three of which have no documented role. Here, we look at the functions of the unstudied RDRs, RDRs 3, 4 and 5, to see whether they affect antiviral resistance.
Analysis Of The Variables Affecting Plant Species Richness In Deserts, Eli R. Kallison, Ellen Thompson, Maddison Keen, Rusty Newman
Analysis Of The Variables Affecting Plant Species Richness In Deserts, Eli R. Kallison, Ellen Thompson, Maddison Keen, Rusty Newman
IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt
There are many hypotheses that attempt to explain patterns of species diversity in different environments. Deserts are a great place to study changes in species richness because they are relatively nutrient bare and exhibit low precipitation. This barebones environment means that slight shifts in climate and geography may lead to clear changes in species richness. We investigate how temperature, precipitation, water and light availability, latitude, elevation and other variables affect plant species richness in 20 deserts.
Influence Of Pinus Contorta And Arctostaphylos Uva-Ursi On The Presence Of Cladonia Portentosa Subspecies Pacifica Within Protected Dune Ecosystems In Arcata, California, Courtney Michelle Harris, Kacia Layman, Jamie Wautlet, Grace Rhoades, Chris Belko
Influence Of Pinus Contorta And Arctostaphylos Uva-Ursi On The Presence Of Cladonia Portentosa Subspecies Pacifica Within Protected Dune Ecosystems In Arcata, California, Courtney Michelle Harris, Kacia Layman, Jamie Wautlet, Grace Rhoades, Chris Belko
IdeaFest: Interdisciplinary Journal of Creative Works and Research from Cal Poly Humboldt
No abstract provided.
Poisonous And Injurious Plants Of The United States: A Bibliography, James P. Smith Jr
Poisonous And Injurious Plants Of The United States: A Bibliography, James P. Smith Jr
Botanical Studies
No abstract provided.
A Checklist Of Vascular Plants Endemic To California, James P. Smith Jr
A Checklist Of Vascular Plants Endemic To California, James P. Smith Jr
Botanical Studies
No abstract provided.
Vascular Plant Families Of The United States (With Common Names And Numerical Summary), James P. Smith Jr
Vascular Plant Families Of The United States (With Common Names And Numerical Summary), James P. Smith Jr
Botanical Studies
No abstract provided.
List Of The Federal And State-Listed Rare, Endangered, & Threatened Plants Of California, James P. Smith Jr
List Of The Federal And State-Listed Rare, Endangered, & Threatened Plants Of California, James P. Smith Jr
Botanical Studies
No abstract provided.