|The preservation of the number and variety of existing habitats increases biodiversity because more species and more individuals can live in those habitats. A habitat that sustains a species provides a physical, chemical and biotic environment for the species to forage and reproduce. Impacts on habitats can include diseases, invasion of competitors and predators, roads and trails, power lines, forest removal, or human activity. Reductions of habitat quality, quantity or changed boundaries will decrease biodiversity. Habitats, like amoebae, expand to fill voids or retract under stress.|
|The TRCA Cold Creek Management Plan, created in 2002, was designed to bring the Conservation Area back into community use with a new focus on education and nature preservation rather than the intensive recreation utilization of the 1960s and 1970s. Only the peripheral and three connecting trails were re-established. Biological surveys conducted by TRCA in 1997, 2001 and 2002 identified 47 plant community types; 341 floral species with 82 listed as “of regional concern”; 89 species of birds, mammals and amphibians resident in Cold Creek. By 2010 the Cold Creek Stewardship identified 121 birds, both resident and migrating, in Cold Creek.During 2002 the Cold Creek Stewardship installed 55 song bird boxes in meadows, on forest edges, and 10 wood duck boxes in wetlands that are all monitored and cleaned each winter. As public use of the trails increased and King Township recreational and educational activities became more popular, the use of boxes by birds changed. Bluebirds that had frequented boxes in open central areas did not return; Hooded Mergansers no longer use nest boxes in the wetland; other species that started spring nests, abandoned eggs and chicks as summer visitor activities increased. The impact of increased human utilization of the Conservation Area is evident from reduced bird box occupancy and shows how bird habitat can change in a season.
MOSAiC Article – Spring 2015MOSAiC Biodiveristy + Habitat
Fahirg, L. 2003. Effects of Habitat Fragmentation on Biodiversity. Annu. Rev. Ecol. Evol. Syst. 34:487-515.
Franklin, A.B., B.R. Noon and L. George. 2002. What is Habitat Fragmentation? Studies in Avian Biology 25:20-29.what is habitat fragmentation
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