Biodiversity: An Introduction
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Ships same day or next business day! This is how the natural belt of bottom vegetation along the Black Sea coast has been destroyed. For example, the vertical distribution range of Cystoseira spp. The consequences were drastic because the habitat is of major importance as a nursery for spawn and hatchlings of many marine species. This led to a drop in reproduction rates and hence fish stocks. Sturgeon populations For the economically important sturgeons, some human activities caused a rapid decline in reproduction rates: All major rivers were dammed for producing hydroelectrical power thus cutting off the migration routes for the sturgeon.
This had serious consequences as the fish live in the sea but need to swim up rivers to spawn. The carnivor jellyfish Mnemiopsis , was introduced to the Black Sea by accident in the early s by ballast water from tankers. This alien species did not have any natural predators in the area and reproduced rapidly forming large populations. Like sturgeon and other fish species the jellyfish feeds on planktonic eggs and larvae.
Competition for food became stronger and eventually the jellyfish outcompeted the causing their dimise. The overfishing and the accidental introduction of the ctenophore Mnemiopsis leydyi in the Black Sea, resulted in the collapse of the pelagic fisheries of the area. The effect of over fishing caused the decline of pelagic fish biomass and the optimal conditions that M.
Threats to Biodiversity | Biology II
For example, the loss of just one species can have different effects ranging from the disappearance of the species to complete collapse of the ecosystem itself. This is due to every species having a certain role within an ecosystem and being interlinked with other species. Experiencing nature is of great importance to humans and teaches us different values. It is good to take a walk in the forest, to smell flowers and breath fresh air. This book is an excellent basic introduction to general biodiversity fo students and teachers, as well as generalists and amateurs interested in exploring the fundamentals, uses, threats and conservation of biodiversity.
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NO YES. Biodiversity: An Introduction, 2nd Edition. Selected type: Paperback. Added to Your Shopping Cart. Timely overview of the serious attempts made to quantify and describe biodiversity in a scientific way Acts as an easy entry point into the primary literature Provides real-world examples of key issues, including illustrations of major temporal and spatial patterns in biodiversity Designed primarily with undergraduate students and course lecturers in mind, it will also be of interest to anyone who requires an overview of, and entry to, the vast literature on these topics.
All the figures included in the book are downloadable from the Blackwell Publishing website. About the Author Kevin J. He has broad research interests in the fields of biodiversity, macroecology and conservation biology. Table of contents Preface.
Australia State of the Environment Report
What Is Biodiversity?. Marion Island. Elements Of Biodiversity.