Biophysics

The Biology of Peatlands (Biology of Habitats) by Hakan Rydin, John K. Jeglum,

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By Hakan Rydin, John K. Jeglum,

The Biology of Peatlands presents a finished evaluation of peatland ecosystems. insurance is foreign even supposing there's a specialise in boreal and north temperate peatlands. As a good as completely referencing the newest study, the authors disclose a wealthy older literature the place a massive repository of normal heritage has accumulated.The e-book starts off with an summary of the most peatland kinds (marsh, swamp, fen and bog), which supplies the root for a deeper realizing of the topic. Chapters then stick with at the range of the full variety of biota current (microbes, invertebrates, crops, and vertebrates), including their particular variations to peatland habitats. specified assurance is dedicated to the moss genus Sphagnum, some of the most very important practical plant teams in northern peatlands. through the ebook, the interactions among organisms and environmental stipulations (especially wetness, availability of oxygen, and pH) are under pressure. within the learn of peatland biology, it really is necessary to find out about peat itself and the way its accumulation displays the background and improvement of peatland over centrueies and millennia. The ebook for that reason comprises chapters at the actual and chemical features of peat, the function of peat as an archive of earlier plants and weather, and peatland successiona dn improvement. a number of different key elements and precesses are then tested together with hydrology, nutrient biking, mild, and temperature. The authors describe the exciting styles and landforms attribute of peatlands in numerous components of the realm, including theories on how they've got constructed. The function of peatlands as assets or sinks for atmospheric carbon dioxide and methane, and their effect on climatic swap, can also be defined. a last bankruptcy considers peatland administration, conservation and recovery issues.This obtainable textual content is acceptable for college kids and researchers of peatlands in addition to the pro ecologists and conservation biologists requiring a concise, authoritative and up to date evaluate of the subject.

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Many species overlap from mainly upland locations onto peatlands, adding to the diversity. g. g. g. Liquidambar styraciflua, Nyssa sylvatica, Pinus elliottii, Taxodium distichum); and scores of species in subtropical and tropical peatlands (see Chapter 11). Species and life form diversity among peatland types The relative role of the plant groups in boreal fens and bogs is shown in Fig. 4. The total species richness increases dramatically in the order bog Ͻ poor fen Ͻ rich fen. In relative terms (proportion of total species number), lichens and liverworts are important in bogs, and herbs and graminoids in fens.

There may be as many as 20 species of Cladonia, but most of them do not have peatlands as their main habitat. There are several large fruticose species known as Reindeer lichen. The Canadian lichen bogs have such a high cover of Cladonia that they appear white on remote sensing. Cetraria islandica is another large species that can achieve rather high covers in northern peatlands. Crustose lichens typically grow on rocks and tree trunks, but there are some peatland species that grow on Sphagnum, such as Absconbditella sphagnorum and Icmadophila ericetorum.

More species can reach the mineral substrate with their roots, and escape some of the nutrient limitation. Diversity may further be augmented by mowing or cattle grazing. This keeps large graminoids in check (their shade and litter will otherwise be detrimental to low herbs), and the trampling promotes seed germination. Sloping fens with their generally thin peat and moving water are sometimes rather herb-rich. Quaking sedge mats often hold a few herb species, for instance Menyanthes trifoliata and Potentilla palustris.

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