|
|
Books > Earth & environment > The environment > Conservation of the environment > Conservation of wildlife & habitats > Endangered species & extinction of species
Quaggas were beautiful pony-sized zebras in southern Africa that
had fewer stripes on their bodies and legs, and a browner body
coloration than other zebras. Indigenous people hunted quaggas,
portrayed them in rock art, and told stories about them. Settlers
used quaggas to pull wagons and to protect livestock against
predators. Taken to Europe, they were admired, exhibited, harnessed
to carriages, illustrated by famous artists and written about by
scientists. Excessive hunting led to quaggas' extinction in the
1880s but DNA from museum specimens showed rebreeding was feasible
and now zebras resembling quaggas live in their former habitats.
This rebreeding is compared with other de-extinction and rewilding
ventures and its appropriateness discussed against the backdrop of
conservation challenges-including those facing other zebras. In an
Anthropocene of species extinction, climate change and habitat loss
which organisms and habitats should be saved, and should attempts
be made to restore extinct species?
Today's conservation literature emphasizes landscape ecology and population genetics without addressing the behavioral links that enable the long-term survival of populations. This book presents theoretical and practical arguments for considering behavior patterns in attempts to conserve biodiversity. It brings together prominent scientists and wildlife managers to address a number of issues, including the limits and potentials of behavioral research to conservation, the importance of behavioral variation as a component of biodiversity, and the use of animal behavior to solve conservation problems. Throughout, the text provides specific direction for research and management practices. The book is unique in its emphasis on conservation of wild populations as opposed to captive and reintroduced populations, where behavioral research has concentrated in the past.
Some ecosystem management plans established by state and federal
agencies have begun to shift their focus away from single-species
conservation to a broader goal of protecting a wide range of flora
and fauna, including species whose numbers are scarce or about
which there is little scientific understanding. To date, these
efforts have proved extremely costly and complex to implement. Are
there alternative approaches to protecting rare or little-known
species that can be more effective and less burdensome than current
efforts? "Conservation of Rare or Little-Known Species" represents
the first comprehensive scientific evaluation of approaches and
management options for protecting rare or little-known terrestrial
species. The book brings together leading ecologists, biologists,
botanists, economists, and sociologists to classify approaches,
summarize their theoretical and conceptual foundations, evaluate
their efficacy, and review how each has been used. Contributors
consider combinations of species and systems approaches for overall
effectiveness in meeting conservation and ecosystem sustainability
goals. They discuss the biological, legal, sociological, political,
administrative, and economic dimensions by which conservation
strategies can be gauged, in an effort to help managers determine
which strategy or combination of strategies is most likely to meet
their needs. Contributors also discuss practical considerations of
implementing various strategies. "Conservation of Rare or
Little-Known Species" gives land managers access to a diverse
literature and provides them with the basic information they need
to select approaches that best suit their conservation objectives
and ecological context. It is an important new work for anyone
involved with developing land management or conservation plans.
Are we now entering a mass extinction event? What can mass
extinctions in Earth's history tell us about the Anthropocene? What
do mass extinction events look like and how does life on Earth
recover from them? The fossil record reveals periods when
biodiversity exploded, and short intervals when much of life was
wiped out in mass extinction events. In comparison with these
ancient events, today's biotic crisis hasn't (yet) reached the
level of extinction to be called a mass extinction. But we are
certainly in crisis, and current parallels with ancient mass
extinction events are profound and deeply worrying. Humanity's
actions are applying the same sorts of pressures - on similar
scales - that in the past pushed the Earth system out of
equilibrium and triggered mass extinction events. Analysis of the
fossil record suggests that we still have some time to avert this
disaster: but we must act now.
The planet is currently experiencing alarming levels of species
loss caused in large part by intensified poaching and wildlife
trafficking driven by expanding demand, for medicines, for food,
and for trophies. Affecting many more species than just the iconic
elephants, rhinos, and tigers, the rate of extinction is now as
much as 1000 times the historical average and the worst since the
dinosaurs died out 65 million years ago. In addition to causing
irretrievable biodiversity loss, wildlife trafficking also poses
serious threats to public health, potentially triggering a global
pandemic. The Extinction Market explores the causes, means, and
consequences of poaching and wildlife trafficking, with a view to
finding ways of suppressing them. Vanda Felbab-Brown travelled to
the markets of Latin America, South and South East Asia, and
eastern and southern Africa, to evaluate the effectiveness of
various tools, including bans on legal trade, law enforcement, and
interdiction; allowing legal supply from hunting or farming;
alternative livelihoods; anti- money-laundering efforts; and demand
reduction strategies. This is an urgent book offering meaningful
solutions to one of the world's most pressing crises.
A portrait of a species on the brinkThe only bird species that
lives exclusively in Florida, the Florida Scrub-Jay was once common
across the peninsula. But as development over the last 100 years
reduced the habitat on which the bird depends from 39 counties to
three, the species became endangered. With a writer's eye and an
explorer's spirit, Mark Walters travels the state to report on the
natural history and current predicament of Florida's flagship bird.
Tracing the millions of years of evolution and migration that led
to the development of songbirds and this unique species of jay,
Walters describes the Florida bird's long, graceful tail, its hues
that blend from one to the next, and its notoriously friendly
manner. He then focuses on the massive land-reclamation and
canal-building projects of the twentieth century that ate away at
the ancient oak scrub heartlands where the bird was abundant,
reducing its population by 90 percent. Walters also investigates
conservation efforts taking place today. On a series of field
excursions, he introduces the people who are leading the charge to
save the bird from extinction-those who gather for annual counts of
the species in fragmented and overlooked areas of scrub; those who
relocate populations of Scrub-Jays out of harm's way; those who
survey and purchase land to create wildlife refuges; and those who
advocate for the prescribed fires that keep scrub ecosystems
inhabitable for the species. A loving portrayal of a very special
bird, Florida Scrub-Jay is also a thoughtful reflection on the
ethical and emotional weight of protecting a species in an age of
catastrophe. Now is the time to act, says Walters, or we will lose
the Scrub-Jay forever.
|
|