GEO 110 Lecture Notes - Lecture 4: Freshwater Ecosystem, Invasive Species, Extinction

• School: Ryerson University
• Department: Geography
• Course: GEO 110
• Professor: Richard Ross Shaker

Document Summary

Disrupts hydrological system (booth & jackson 1997) Modifies energy flow and nutrients cycles (grimm et al. 2000) Lpi of global biodiversity has decline = since the 1970s (wwf 2014) Ef has been estimated at = 50% overshoot, projecting global humanity requirements of two planets by 2030s (wwf2014) Freshwater ecosystem is likely the most at risk to anthropogenic stressors (novotny et al. Policy and goals (cid:1005)(cid:1013)(cid:1011)(cid:1006) clea(cid:374) (cid:449)ater act (cwa(cid:1004), a(cid:373)e(cid:374)ded (cid:1005)(cid:1013)(cid:1011)(cid:1011), (cid:1005)(cid:1013)(cid:1012)(cid:1011), (cid:1005)(cid:1013)(cid:1013)(cid:1004) : pollution control programs, waste water standards for industry, construction of sewage. The severe economic impact of invasive species is evident; estimated costs of is worldwide total more than 1. 4 trillion 5 percent of global economy (pimental et al. 2001) I the united states alone, estimated economic damages and control costs associated with is amount to roughly 120 billion annually (pimmentel et al. 2005) Number of game fish; native species present. Riparian use, lad cover composition, and landscape diversity. Research obkectives: examine the distribution of aquatic invasive species.