Life Sciences Commons^™

Drought Tolerance In Native And Invasive Populations Of The Centaurea Jacea Hybrid Complex, Zoe Portlas

Graduate College Dissertations and Theses

Introduced plants face many ecological and evolutionary challenges when establishing in a new range, such as strong abiotic stressors and potentially novel selective environments. One such abiotic stress is water availability, which is a strong selective force shaping physiological and phenological traits that enable plants to tolerate or avoid drought stress. Despite the challenges of establishing in a new range, thousands of species have become invasive in recent centuries. Two hypotheses that may explain how a species is able to withstand stress in its introduced range are preadaptation, which posits that species are adapted to similar environments in their native …

Evolution Of Drought And Low Temperature Responses In Temperate Pooideae Grasses: Timings, Determinants, And Intersections, Aayudh Das

Graduate College Dissertations and Theses

Anthropogenically-mediated rises in atmospheric CO2 and global average temperatures is leading to increasingly severe drought and extreme weather events, the latter including unseasonal bouts of low and high temperatures. In order for plant breeders and conservation biologists to predict future responses to global warming, they must understand the ecological and evolutionary processes that shaped plant tolerance to stressful environments in the past. This is particularly true for grasses (Poaceae) that dominate approximately one-third of the Earth's vegetative cover, live in some of the world's harshest terrestrial environments, and are tremendously important, both ecologically and economically. One of the largest subfamily …

A Generic Classification Of The Thelypteridaceae, Susan E. Fawcett

Graduate College Dissertations and Theses

The Thelypteridaceae is among the largest fern families, with over 1000 species, and comprises about 10% of all fern diversity. The family is cosmopolitan and most diverse near the equator, although species range as far north as Greenland and Alaska, and as far south as southern New Zealand. The generic classification of the Thelypteridaceae has been the subject of much controversy among authors. Proposed taxonomic systems have varied from recognizing more than 1000 species in the family within a single genus, Thelypteris, to systems favoring upwards of 30 genera. Insights on intrafamilial relationships have been gained from recent phylogenetic studies, …

Investigating The Effects Of Ant-Hemipteran Mutualisms On The Invertebrate Community Structure And Their Host Plant, Honey Mesquite (Prosopis Glandulosa), Nabil Nasseri

Graduate College Dissertations and Theses

Ants are ubiquitous in most communities and many form opportunistic mutualisms with honeydew-producing hemipterans (e.g. treehoppers). Hemipterans excrete honeydew, a carbohydrate rich substance, that ants harvest and, in return, ants protect their honeydew-producing partners from parasitoids, predators, and competitors. Given the efficacy of tending ants in removing hemipteran antagonists, and the strong roles that ants play within their communities as predators, competitors, and seed dispersers, surprisingly little is known of the effects of ant-hemipteran mutualisms (AHM) on the invertebrate communities in which they are embedded or on the plants that host AHM. Using observational and manipulative field experiments, I examined …

Master's Project: An Ecological Inventory And Assessment Of The Pond Brook Region In Monkton, Vermont, Lyra D. Brennan

Rubenstein School Masters Project Publications

The Pond Brook Watershed in Monkton, Vermont, is a 19,000-acre patchwork of northern white cedar swamps, oak-covered ridgetops, and prime agricultural soils. Over 95% of the watershed is privately owned, limiting ecologists’ abilities to conduct a landscape-scale field assessment or determine significant natural resources within the area. I was hired by the Agricultural and Natural Areas Committee of Monkton [ANAC] to conduct an ecological assessment of the Pond Brook Watershed by visiting a diverse sampling of privately-owned parcels and inventorying the 300-acre town owned wetland.

I worked with over 30 individual landowners to understand current and historical land use in …

The Problem Of Morphogenesis: Unscripted Biophysical Control Systems In Plants, Philip M. Lintilhac

College of Agriculture and Life Sciences Faculty Publications

No abstract provided.

Collection Book 1909, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1909.

Collection Book 1908, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1908.

Collection Book 1907, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1907

Collection Book 1906, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1906.

Collection Book 1905, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1905.

Collection Book 1904, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1904.

Collection Book 1903, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1903.

Collection Book 1902, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1902.

Collection Book 1901, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1901.

Collection Book 1900, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1900.

Collection Book 1899, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1899.

Collection Book 1898, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1898.

Collection Book 1897, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1897.

Collection Book 1896, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1896.

Collection Book 1895, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1895.

Collection Book 1894, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1894.

Collection Book 1893, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1893.

Collection Book 1892, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1892.

Collection Book 1891, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1891.

Collection Book 1890, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1890.

Collection Book 1889, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1889.

Collection Book 1888, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1888.

Collection Book 1887, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1887.

Collection Book 1886, Cyrus Guernsey Pringle

Cyrus Pringle Collection Notebooks

This is the journal Cyrus Pringle kept during his collection trips in 1886.