| Abstract: | A pilot study to develop and test a probability-based intertidal monitoring protocol for Sitka National Historical Park was conducted from 1999 to 2003. In 1999, the basic design, with a focus on sampling the whole of the designated intertidal was created, and sampling was conducted for sessile species and large mobile invertebrates by point-intercept sampling of vertical transects and band surveys along transects, respectively. In 2002 and 2003, the same types of sampling were conducted, but quadrat sampling for small mobile invertebrates was added and then modified. This project has produced basic data on the presence, abundance, and spatial distribution of substrates and intertidal biota. Additionally, statistical power analyses conducted on the biological data have allowed assessment of the ability of the sampling to detect trends in the abundance of the predominant species. Current sampling has an 80 percent probability to detect +10 percent annual changes in abundance of all targeted species with an a = 0.05; the ability to detect -10 percent trends is not as uniformly high. Various options are discussed for decreasing the spatial variance of the data. The information presented provides a basis for discussion of the major questions being asked, how the sampling design might be reconfigured to be consistent in approach, and how the intertidal monitoring should interface with other potential intertidal monitoring. |
| Genre: | USGS Numbered Series |
| ProdID: | 86131 |
| Citation Author: | Irvine, Gail V.; Madison, Erica N. |
| Citation Contributing Office: | USGS Alaska Science Center |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | vi, 59 p. |
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| Citation Public Comments: | Prepared in cooperation with the National Park Service Southeast Alaska Coastal Cluster Program and Sitka National Historical Park |
| Citation Publisher: | Geological Survey (U.S.) |
| Citation Series: | Scientific Investigations Report |
| Citation Series Code: | SIR |
| Citation Series Number: | 2008-5139 |
| Citation Search Results Text: | Development of a Monitoring Protocol to Detect Ecological Change in the Intertidal Zone of Sitka National Historical Park, Alaska; 2008; SIR; 2008-5139; Irvine, Gail V.; Madison, Erica N. |
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| Citation Year: | 2008 |
| Type: | citation/reference |
| Text: | Development of a Monitoring Protocol to Detect Ecological Change in the Intertidal Zone of Sitka National Historical Park, Alaska; 2008; SIR; 2008-5139; Irvine, Gail V.; Madison, Erica N. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/sir_2008_5139.png |
| URL (INDEX PAGE): | http://pubs.usgs.gov/sir/2008/5139/ |
| Date Other: | Sat, 23 Aug 2008 00:00 -0500 |
| Publisher: | Geological Survey (U.S.) |
