Botany Subdivisions

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  Botany Historically all living things were grouped as animals or plants . Botany covered all organisms not considered animals.Organisms that were once included in the field of botany  but no longer belong to the plant kingdom include fungi (studied in mycology), lichens (lichenology), bacteria (microbiology), viruses (virology) and algae, which are now a major part of the Protista. Botany , or plant science ( s ), or plant biology is a part of the biological sciences (like zoology, mycology, microbiology, biochemistry, ecology etc. that involves the study of plants, algae and fungi. However, botanists still pay attention to these groups & cover them in introductory botany courseIn Roman mythology, Flora is the goddess of flowers and spring. A flora is the plant life in a particular region, flora of the Pacific West coast covered by Pojar & McKinnon.Flora and Fauna are plants & animals of …  Floras of the Pacific NorthWest Coast Plants of the Pacific Northwest Coast: Washington, Oregon, British Columbia, and Alaska [Paperback] Jim Pojar (Author), Andy MacKinnon (Author) .  The subdivisions of Botany Economic botany = relationships between people and plants = ethnobotany Phytosociology study of plant communities & relationships between species Ethnobotany = how indigenous populations make use of plants Biometerology subfield that relates plants with environment & weather Plant ecology (ecology of vascular plants on land and inwetland ecosystems)established sub fields are: Plant pathology (diseases and the changes they cause in structure &function) Phycology (algae) Horticulture (the science of cultivating plants) Agronomy (soil management and crop management) Paleobotany (fossils) Plant taxonomy (categorizing plant species, these days using DNA analysis) Paleoclimatology how plants contributed to the atmosphere through history!) Palynology (spores and pollen, both fossilized and current, where a body has  been laying in a particular spot, see forensic botany ) Bryology (mosses and liverworts) Dendrology (woody plants) Lichenology (lichens) Phycology (algae) Pteridology (ferns) Xylology (study of the structure of wood) Genetics, systematics, cytology, anatomy, morphology, plant physiology, pathology, and ecology are theestablished broad sub fields of botany.  Dendrochronology -tree rings reveal the past Dr. A. Douglas studied the climates of the past. Found that varying thickness/ width of annual rings corresponds to climate dry year  narrow ring wet year  wide ring Principle: Trees from the same area & same time show identical sequence of narrow vs wide rings.Trees of different periods show sufficient overlap to allow to trace the climate over several lifetimes of trees. Douglas matched rings from tress used in the construction of Indian pueblos with his data library and determined the age of the construction as 53 BC.
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