BIOB50H3 Lecture 6: Lecture-6-and-7
4 Nov 2016
School
Department
Course
Professor
Document Summary
Energy assimilated by autotrophs and stores as carbon compounds in plant tissues; carbon is the currency used for the measurement of primary production. Primary productivity is the rate of primary production. Harsher environment: more allocation to roots, less in above ground ecosystem. Plants can allocate their carbon in either: aboveground. Provide 3 reasons why high altitude plants have this short morphology: high altitude = shorter shoots. Forb on right = growing at a high altitude, with greater allocation to roots than shoots and tend to be rocky, have young soil. Radiation: less atmosphere to filter radiation and there is more intense sunrays. Sunlight: the(cid:455) do(cid:374)"t (cid:374)eed to compete for sunlight (all plants get sunlight) Wind: high winds exist at higher altitudes (cid:894)o(cid:1006) li(cid:373)itatio(cid:374) does(cid:374)"t (cid:373)atte(cid:396)(cid:895), snowfall also makes them shorter. Dry air: high evaporative demand, dry air and the plants need to be small to reduce surface area (to keep as much water as they can: roots are more complex.
