"From the macaws of South America to the cockatoos of Australia, parrots are among the most beautiful and exotic birds in the world--and also among the most endangered. This ... covers all 356 species and well-differentiated subspecies of parrots, and is the only guide organized…
This master thesis addresses a large-scale biogeographical question, the distribution and evolutionary history of a marine species complex with a vast distribution in the northern hemisphere. This complex includes two intertidal brown macroalgae, Fucus spiralis and Fucus guiryi,…
Captive breeding and reintroduction are key to modern conservation, but high predation of released animals means reintroductions often fail. The captive environment can provide individuals with little opportunity to learn about predators or alarm calls. As a consequence, captive…
Insecticide application via indoor residual spraying (IRS) and long-lasting insecticide-treated bednets (LLIN) has been a key component in combating malaria in sub-Saharan Africa, with pyrethroids being the traditionally recommended insecticides. However, the resistance of Anoph…
Across most of North America, white-tailed deer ( Odocoileus virginianus ) populations are increasingly overabundant and the widespread impacts of their herbivory are having important ecological and economic repercussions. The cascading consequences of white-tailed deer overabun…
Chimpanzees are declining at a rate of up to 6.5% per year in some parts of Africa due to human impacts. Effective conservation relies on accurate and reliable information on population density, distribution and connectivity. Yet, traditional line transect surveys are costly to …
Amphibians exhibit a pronounced population decline, and it is estimated that up to a third of amphibians are threatened with extinction. My research focuses on the Near Eastern fire salamander ( Salamandra infraimmaculata ), species which facing a certain level of risk in Israel…
This project expands on the 4200-year history of Laguna Los Mangos by adding diatom analysis to existing records of pollen, charcoal, elemental composition, and stable light isotope analysis. Diatoms were counted in peroxide-treated samples, and data were analyzed using cluster …
This dissertation investigates the ecology and distribution of amphibians, parasites, and their interactions within aquatic ecosystems. Throughout my dissertation, I use quantitative tools and field observations to examine the factors limiting distributions of amphibians and the…
This floristic inventory is focused on the upper portion of the Sespe Creek watershed in northern Ventura County, California. Sespe Creek is a Wild and Scenic River in the Los Padres National Forest (LPNF). The Sespe Creek has substantial intact riparian habitats and high levels…
Anthropogenic changes in land use, exploitation of natural resources, climate change, and habitat loss create difficulties managing and conserving species of concern. Managers are often forced to make decisions with incomplete information and much uncertainty. Unsuccessful attem…
Rare, arctic relict plant populations of Minnesota, found in the cool and moist microclimate produced along the cold waters of Lake Superior, face an uncertain future due to anthropogenic climate change. In this study, we used a variety of approaches to examine the contemporary …
This study focuses on the Kenyan Amboseli landscape, which comprises the Amboseli National Park and six neighbouring Maasai community Group Ranches, namely Mbirikani, Kuku, Kimana, Eselengei, Ologulului-Ololorashi Ologulului, and Rombo. Over the past five decades, Amboseli has b…
Pest management is essential to prevent crop losses. Chemical pesticides are standard practice in conventional farming systems because they are simple to use, cheap, and usually highly effective in providing short-term reduction in pest densities. Yet, their use can also lead to…
White-tailed deer ( Odocoileus virginianus ) are hyperabundant in parts of Thousand Islands National Park because of their ecological impact on its forests. To manage the high number of deer on Hill Island, an annual population reduction occurs in the park. This study is intende…
The sharp-tailed grouse(Tympanuchus phasianellus) is a symbol of Saskatchewan and has important cultural and economic status in the province. Over the last few decades this species has been declining in Saskatchewan, especially in southern grassland regions. While the decline in…
Ishrana je jedan od osnovnih životnih procesa koji životinjama obezbeđuje energiju i hranljive materije za rast i normalno funkcionisanje organizma. Optimalnost ishrane umnogome zavisi od dostupnosti hranidbenih resursa. Ovo je naročito važno za hibernatore, kojima preživljavanj…