000			01888cam a22003377a 4500
001			40340239
003			MaObMVR
005			20201006111615.0
008			020215s1999 oncab b 001 0 eng d
010			_a2002319027
020			_a1552093301
035			_a(OCoLC)ocm40340239
040			_aCaOTU _beng _cNLC _dYAM _dPSM _dDLC
043			_an------
050	0	0	_aQH102 _b.B43 1999
082	0	0	_a577.6 _221
100	1		_aBeck, Gregor Gilpin, _d1964- _921891
245	1	0	_aWatersheds : _ba practical handbook for healthy water / _cillustrations and original concept by Clive Dobson ; text by Gregor Gilpin Beck.
260			_aWillowdale, Ont. : _bFirefly Books, _c1999.
300			_a152 p. : _bill. (chiefly col.), col. maps ; _c26 cm.
504			_aIncludes bibliographical references (p. 148) and index.
505	0		_aWhat is a watershed? -- How watersheds work : water and nutrient cycles -- From headwaters to outflows : parts of a watershed -- Natural changes within watersheds -- Air pollution -- Water pollution -- The impact of exotic species : hidden invaders -- Habitat loss and degradation -- Ecological restoration : righting environmental wrongs -- Conclusion -- Appendices. I. The five Kingdoms of living things ; II. Food chains, food webs, and ecological pyramids ; III. Common aquatic invertebrates of flowing and still waters.
650		0	_aWatershed ecology _zNorth America. _921892
650		0	_aWatersheds _zNorth America. _921893
650		0	_aWater conservation _921895
700	1		_aDobson, Clive, _d1949- _921894
856	4	2	_zContributor biographical information _uhttp://www.loc.gov/catdir/enhancements/fy0614/2002319027-b.html
856	4	2	_zPublisher description _uhttp://www.loc.gov/catdir/enhancements/fy0614/2002319027-d.html
856	4	1	_zTable of contents only _uhttp://www.loc.gov/catdir/enhancements/fy0614/2002319027-t.html
942			_2ddc _cBK
999			_c110002 _d110002