Pamphlets on Forestry, Volume 41991 |
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Page 372
... marked variations within short periods of time in the color of the water and in the presence of such animals as Daphnia and Cyclops . No attempt has been made to count or even separate the bacteria present , but it is probable that they ...
... marked variations within short periods of time in the color of the water and in the presence of such animals as Daphnia and Cyclops . No attempt has been made to count or even separate the bacteria present , but it is probable that they ...
Page 418
... marked contrast between its characteristics and those of the other plant habitats of its vicinity . In both its atmos- pheric and edaphic conditions it is unique . The various factors entering into the plant environment will be ...
... marked contrast between its characteristics and those of the other plant habitats of its vicinity . In both its atmos- pheric and edaphic conditions it is unique . The various factors entering into the plant environment will be ...
Page 382
... marked xerophilous characters . The leaf is reduced in area , increased in relative thickness , and the margins become revolute ; the epidermal cells are smaller and outwardly thick - walled ; a well- marked cuticle is present ; the ...
... marked xerophilous characters . The leaf is reduced in area , increased in relative thickness , and the margins become revolute ; the epidermal cells are smaller and outwardly thick - walled ; a well- marked cuticle is present ; the ...
Contents
The Huron River valley 351 | 351 |
their development and ecological conditions | 360 |
The bog plant societies | 429 |
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2d whorl 4th whorl abundant acidity aggregate ray Alnus aments annual ring apex Aronia basin bast fibers Betula bog areas bog plants bog societies bog water branches cambial activity cambium cassandra conifers creosote crystals cutting depressions diameter increase Dicotyledons drainage drained factors Fagales fiber bundles foliar ray forest formation glacial growth habitats HARTIG heartwood hickory Huron June lake larch Larix layers leaves lower Michigan moraine occur parenchyma parenchyma cells peat perianth periderm phloem pine Pinus piñon Pinus rigida pith rays plant societies Platanus plates present Quercus radial region resin canals roots rows Salix sapwood scattered sclerenchyma sclerotic sedge shrubs sieve tubes soil species specimens sphagnum stem stone cells substratum surface swamp tamarack temperature thick tissue tracheids trees trunk tyloses undrained uniseriate rays vegetation vessels Viola blanda walls white oak wood xerophilous xylem zone μ μ μ