Download or read book Avian Desert Predators written by William E. Cook and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unlike mammals, birds are not particularly well suited to desert life. Among the few types of birds that have successfully adapted to the desert ecosystem are the predators. With individual chapters devoted to each of the different species, the book explores those attributes which make this group suited to desert life, and how they have developed their abilities to cope with the prevailing harsh conditions. This readily accessible volume collates a substantial amount of the latest research on this fascinating subject.
Download or read book Nomadic Desert Birds written by W. Richard J. Dean and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: My interest in the behaviour and movements of birds of arid and semi-arid ecosystems began when my wife, Sue Milton, and I were Roy Siegfried, Director, at that time, of the Percy approached by Prof. FitzPatrick Institute of African Ornithology, to set up a project to investigate granivory in the South African Karoo. Sue and I spent some time finding a suitable study site, setting up accommodations and an automatic weather station at Tierberg, in the southern Karoo near the village of Prince Albert, and planning projects. Among our first projects was a transect where we noted plant phe nology, measured seed densities on the soil surface, counted birds, observed ant activity, measured soil surface temperatures and col lected whatever climate data we could at 40 sites along a 200-km oval route. Along the way, we became interested in the marked presence and absence of birds at certain sites - abundant birds one day, and very few birds at the same site a month later. Subsequent counts along fixed transects through shrublands confirmed that a number of bird species were highly nomadic over short and long distances, locally and regionally, leading to speculation on how widespread these movements were in the arid ecosystems of the world.
Download or read book A Century of Avian Community Change in the Desert Southwest written by Kelly Jeanette Iknayan and published by . This book was released on 2018 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Species extinctions and population declines have accelerated over recent decades due to habitat destruction, overexploitation, and invasive species, with cascading effects on ecosystem functions and services as well as human well-being. Climate change has emerged as another powerful driver of species decline, one whose effects are beginning to intensify. It should lead to shifts in species distributions and rearranged communities, unless climatic disruption acts as a systemic threat leading to a community collapse. Desert birds comprise a species-rich, easily detectable assemblage, and are closely coupled to their physical environment, which makes them suitable indicators of climatic change. I assessed how desert bird populations have been impacted over the past century by resurveying 106 sites throughout the Mojave and Great Basin deserts that were originally surveyed for avian diversity in the early 20th century by Joseph Grinnell and colleagues from the Museum of Vertebrate Zoology at University of California, Berkeley. Multispecies occupancy models were employed throughout this research to capture the dynamics of the entire avian community. In my first chapter, I review the impacts of imperfect detection on the estimation of community diversity and how the application of multispecies occupancy models to estimate these measures can alleviate this source of error. The hierarchical structure of the model allows data from the entire sample to inform the estimation of occupancy, colonization, survival, and detection probabilities, despite encounter histories being stratified by historic and modern surveys, species, site, and visit. Data from all species’ informs the estimation of community-level values, and the structure of the model itself facilitates the modeling of all species, including rare ones. Correcting for detection is particularly important when using historic data, because differences in methodology and changes in technology that can alter the detectability of species through time can also influence the conclusions drawn from the comparison. Deserts, already defined by climatic extremes, have warmed and dried more than other regions in the contiguous United States due to climate change. In my second chapter, I assessed how climate change and habitat disturbance have impacted bird populations of the Mojave Deserts. The resurveys of sites originally visited in the early 20th century found Mojave Desert birds strongly declined in occupancy and sites lost nearly half of their species. Declines were associated with climate change, particularly decreased precipitation. The magnitude of the decline in the avian community and the absence of species that were local climatological “winners” is exceptional. Our results provide evidence that bird communities in the Mojave Desert have collapsed to a new, lower baseline. Declines could accelerate with future climate change, as this region is predicted to become drier and hotter by the end of the century. Where the Mojave and Great Basin meet is a juncture of two distinct avifauna. My third chapter uses a dynamic multispecies occupancy model to evaluate the cumulative effects of the redistribution of all 162 observed breeding species across space, time, and biomes. Cross-system comparisons can verify that trends are more than just regional in nature, which legitimizes their application to the development of broad-scale predictive models or management recommendations. The Mojave, a warm desert, and the Great Basin, a cold desert, are two very different systems with distinct vegetation and animal assemblages. The contiguity of the deserts creates an ideal place to study how 20th century climate change is differentially impacting communities across biomes. A transition zone can persist through a changing climate if biotic factors lag behind climate, such as the leading and trailing-edge range disequilibria in vegetation response, and inherent abiotic factors, such as topography and edaphic factors that contribute to the Mojave-Great Basin transition. Barriers to northward expansion for birds could result in range collapse if the southern limits of warm desert species are also contracting. I evaluated whether species of the warmer Mojave, which continues to warm, are expanding into the colder Great Basin Desert, which has incurred less warming, or whether the transition zone behaves as a barrier to northward expansion. Individual species experienced occupancy changes in consistent directions in both deserts. A substantial proportion of species were in decline in one or both deserts (39.5%), while relatively few species were increasing (6.2%). Most species (n = 80) shifted one or both of their latitudinal range limits. Range shifts were highly idiosyncratic in nature, causing the avifaunas of the two deserts to be less strongly structured than they were in the past. The redistribution of species is driving the genesis of novel communities which may have ecological consequences that are yet to be realized. This dissertation presents a detailed picture of how desert avifauna has change over the past century. The unique ecology of the deserts means that can serve as bellwethers of climate change. Community collapse of the Mojave avifauna and the redistribution of species across both deserts would have been overlooked without the original faunal surveys of Joseph Grinnell and colleagues from the early 20th century. Although similar changes may be occurring in other ecoregions that lack comparable historical data, the harsh nature of desert environments makes them more likely to become less suitable for life and offers a prescient warning for biodiversity loss as future climates are pushed further toward extremes.
Download or read book Ecophysiology of Desert Birds written by Gordon L. Maclean and published by Springer Science & Business Media. This book was released on 2013-12-11 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Preface to his volume on Ecophysiology of the Camelidae and Desert Ruminants in this series, Trevor Wilson mentions his hesitation at the invitation from John Cloudsley-Thompson to write the book, because he had been out of direct touch with desert biology for some years. My response to John's invitation to write Ecophysiology of Desert Birds was much the same, and for the same reasons. However, with his encouragement and, taking account of the fact that a colleague of mine who is much better suited to do the job had turned it down because of pressure of work, I accepted the challenge and have enjoyed it immensely. It has been my privilege to spend much time in the deserts of North and South America, southern Africa and Australia, some of it with my wife, Cherie, whose editing of the entire text has improved the work immeasurably. Indeed, I believe it would have been proper for her to accept coauthorship, but she graciously declined the offer! I owe her a debt of gratitude which I hope will be repaid in part by her seeing the text finally between covers. The chapters on water regulation (Chap. 5) and thermo regulation (Chap. 6) have benefited from the refereeing of my colleague, Dr. Barry Lovegrove, of the Department of Zoology and Entomology, University of Natal, Pietermaritzburg.
Download or read book Variety is the Spice of Desert Bird Life written by Malory Blake Owen and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plants provide habitat and resources to the desert animal community. However, these interactions are species specific and can depend on season. I tested the hypothesis that birds use different foundation species in deserts as microhabitat, and birds shift associations by flowering and fruiting life-stages. I used line transects to record habitat associations of birds at a protected site in the Mojave Desert. I found that the bird biodiversity and behaviour were not equally represented across all microhabitats or season. Diversity of birds and territorial behaviors were significantly greater at shrubs microhabitats in spring. Shrubs likely primarily provided structural heterogeneity for the avian community to use as perches, nests, and other non-trophic services because foraging and consumption were observed less often. Bird biodiversity was greater at cacti than at open summer microhabitats, which supported the least bird biodiversity. Non-trophic interactions with plants are important for maintaining local bird diversity in deserts.
Download or read book Wings in the Desert written by and published by University of Arizona Press. This book was released on 2007 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a common but often unspoken arrogance on the part of outside observers that folk science and traditional knowledgeÑthe type developed by Native communities and tribal groupsÑis inferior to the Òformal scienceÓ practiced by Westerners. In this lucidly written and humanistic account of the OÕodham tribes of Arizona and Northwest Mexico, ethnobiologist Amadeo M. Rea exposes the limitations of this assumption by exploring the rich ornithology that these tribes have generated about the birds that are native to their region. He shows how these peoplesÕ observational knowledge provides insights into the behaviors, mating habits, migratory patterns, and distribution of local bird species, and he uncovers the various ways that this knowledge is incorporated into the communitiesÕ traditions and esoteric belief systems. Drawing on more than four decades of field and textual research along with hundreds of interviews with tribe members, Rea identifies how birds are incorporated, both symbolically and practically, into Piman legends, songs, art, religion, and ceremonies. Through highly detailed descriptions and accounts loaded with Native voice, this book is the definitive study of folk ornithology. It also provides valuable data for scholars of linguistics and North American Native studies, and it makes a significant contribution to our understanding of how humans make sense of their world. It will be of interest to historians of science, anthropologists, and scholars of indigenous cultures and folk taxonomy.
Download or read book Avian Architecture written by Peter Goodfellow and published by Princeton University Press. This book was released on 2011-06-05 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: Examines the nests that birds build around the world, including illustrations of each nest type's construction, descriptions of the materials and techniques used during the process, and case studies on specific birds' habitats.
Download or read book A Field Guide to Birds of the Desert Southwest written by Barbara L. Davis and published by Taylor Trade Publishing. This book was released on 1997-03-01 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: This field guide takes you to the desert and grassland areas of Arizona, California, and New Mexico where the total number of bird species reaches a staggering 440. Included are 21 desert birding hot spots, in-depth descriptions and behavioral information, 8 bird charts, and much more.
Download or read book Survival Strategies of Annual Desert Plants written by Yitzchak Gutterman and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annual desert plant species of unrelated taxa in the Negev Desert of Israel have developed complementary sets of adaptations and survival strategies as ecological equivalents with physiological, morphological and anatomical resemblances, in the various stages of their life cycles. After 40 years of research in hot deserts Yitzchak Gutterman provides a comprehensive treatise of such adaptations and strategies. In doing so he covers the following topics: post-maturation primary seed dormancy, which prevents germination of maturing seeds before the summer; seed dispersal mechanisms with escape or protection strategies; cautious or opportunistic germination strategies; seedling drought tolerance. The day-length is an important factor in regulating flowering as well as the phenotypic plasticity of seed germination which is also affected by maternal factors.
Download or read book Homeostasis in Desert Reptiles written by Sidney Donald Bradshaw and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deserts, whether hot or cold, are considered to be one of the most difficult environments for living systems, lacking the essential free water which ac counts for approximately 60-70% of their body mass and more than 98% of their constituent atoms {Macfarlane 1978}. Amongst vertebrates, reptiles are usually thought of as the animals most adapted or suited to such environments because of their diurnal habit, based on a need for external heat, and their ability to survive far from obvious sources of water. This impression is rein forced when one examines the composition of vertebrate faunae characteristic of deserts and arid zones: reptiles predominate and they are often the only vertebrates to be found in hyper-arid areas, such as some parts of the Sahara {Monod 1973}. I recently had occasion to examine this assumption carefully, however, and was led inexorably to the conclusion that reptiles represent a particularly successful desert group, not because of their evolution of superior adaptations, but because of their possession of a basic suite of behavioural and physiologi cal characteristics that suit them uniquely to this very resource-limited environment {Bradshaw 1986a}. These fundamental reptilian characteristics are: 1. their low rates of metabolism, compared with birds and mammals, which result in extremely low rates of resource utilisation and lead to considerable economy in the handling of water 2.
Download or read book Dispersal Biology of Desert Plants written by Karen van Rheede van Oudtshoorn and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dispersal processes have important effects on plant distribution and abundance. Although adaptations to long range dispersal (telechory) are by no means rare in desert plants, many desert plant species do not possess any features to promote dispersal (atelechory), while others have structures that hamper dispersal (antitelechory). The high frequency with which atelechorous and antitelechorous mechanisms are present in plants inhabiting arid areas indicates the importance of these adaptations. Among the benefits derived from these adaptations are the spreading of germination over time, the provision of suitable conditions for germination and subsequent seedling establishment, and the maintenance of a reservoir of available seeds (seed bank). This book describes the ways and means - anatomical, morphological and ecological - by which dispersal in desert plants has evolved to ensure the survival of these species in their harsh and unpredictable environment.
Download or read book Plants in the Deserts of the Middle East written by Kamal H. Batanouny and published by Springer Science & Business Media. This book was released on 2000-12-15 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Usually authors write introductions for their books, although they know that not many readers will read it. Despite this, authors insist on writing an introduction and no publisher will publish a book without one. I would like to inform my dear readers that I have spent almost all of the first quarter of my life in a village in the Nile Delta, 65 km north of Cairo. The everyday scenery there was the beautiful green landscape dissected with canals full of running water. All of these were bordered with the huge sycamore, mulberry and acacia trees. The desert was something unknown to me at that time, except for the very basic information given in geography books, which explained that the desert is a place without water or cultiva tion. Some of my ideas about the desert came to me from the stories in the history of Islam and the desert lands where Islam originated. My real attraction to the desert developed in the last year of my under graduate studies. This was during the field courses in Ecology (Prof. A.M.
Download or read book Desert Arthropods Life History Variations written by Fred Punzo and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is difficult for me to recollect a time when I was not fascinated with the very notion of a desert. Walt Disney's film, The Living Desert, which I initially saw when I was 8 years of age, provided me with my first glimpse of this wondrous yet seemingly ho stile environment. The images were hypnotic and captivating. I looked on in amazement at the promenade Cl deux of the male and female scorpions during courtship. Their rhythmic and coordinated movements as they grasped one another made them appear to glide in unis on over the surface of the sand, each individual totally absorbed with its partner. In the next minute the fern ale had suddenly and utterly transformed herself like some Jekyll and Hyde act, into an aggressive predator whose prior gregarious embrace was now a hold of death for the male. The indomitable desert grasshopper mouse, the ever sentient kit fox, the graceful shovel-nosed snake swimming in an endless sea of sand.
Download or read book Strange Creatures of the Desert written by Stanley Bank and published by . This book was released on 1982 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the ways in which desert animals such as the spadefoot toad, desert shrimp, chuckwalla, and sand grouse adapt in order to survive in the hot, dry climate.
Download or read book The Raptors of Arizona written by Richard L. Glinski and published by University of Arizona Press. This book was released on 1998-03 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thousands of birdwatchers come to Arizona each year seeking rare or intriguing species, and for those watching the skies the additional sighting of a bird of prey is a reward in itself. The Grand Canyon state boasts the most dramatic assortment of raptors in North America: hawks, eagles, falcons, kites, and owls, plus vultures and condors. Here can be found nearly all the raptor species of the continental United States and also established populations of species associated with Mexico, such as the Gray Hawk, Common Black-Hawk, Zone-tailed Hawk, and Whiskered Screech-Owl. Arizona's raptors are found in an unrivaled diversity of habitats, from saguaro cactus forests where tiny Elf Owls nest to the Vermilion Cliffs, where the gigantic California Condor was introduced in 1996. Yet many species live in habitats that are now jeopardized by degradation or development, making an understanding and appreciation of raptors crucial to their survival. The Raptors of Arizona brings together the knowledge and insights of 29 raptor and wildlife authorities who provide original information and syntheses on Arizona's 42 raptor species, with an emphasis on aspects of their natural history in Arizona. A chapter on each bird includes its description, a range map, and information on its distribution, habitat, life history, and status. Additional chapters cover conservation, habitats, where and when to watch raptors, and the sport of falconry. The book is enhanced by 42 full-color illustrations by Richard Sloan, one of the premier wildlife artists in North America, whose paintings were commissioned by the Arizona Wildlife Foundation specifically for this project. Co-published with the Arizona Game and Fish Department
Download or read book Ecophysiology of Desert Birds written by Gordon L. Maclean and published by Springer Science & Business Media. This book was released on 1996 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scientific study of birds in arid regions has been conducted more or less intensively for about 40 years. This is an appropriate time to draw together the threads of the diverse research on birds living in such an extreme environment. Topics include: Desert Avifaunas; Food and Energy; Water - Drinking; Water Regulation; Thermoregulation; Timing of Breeding; Ecology of Breeding.
Download or read book Desert Tortoise Mojave Population Recovery Plan written by and published by . This book was released on 1994 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
