Appendix A. Detailed information about the study sites (locations, crayfish densities, environmental conditions, and interannual variability).
TABLE A1. Locations of study sites.
Site | Latitude | Longitude |
Neversink 1 | 41°25'38.82" | 74°36'30.80" |
Neversink 2 | 41°38'13.39" | 74°37'4.13" |
Delaware 1 | 41°25'26.56" | 74°45'27.12" |
Delaware 2 | 41°26'18.13" | 74°49'18.82" |
Delaware 3 | 41°46'5.01" | 75°3'57.51" |
Delaware 4 | 41°48'47.35" | 75°5'38.81" |
Delaware 5 | 41°51'56.47" | 75°15'45.77" |
Croton 1 | 41°26'49.12" | 73°33'22.54" |
Croton 2 | 41°30'28.55" | 73°75'49.11" |
Shawangunk 1 | 41°36'5.90" | 74°19'38.74" |
Shawangunk 2 | 41°26'37.06" | 74°31'42.47" |
Webatuck 1 | 41°46'51.88" | 73°33'22.19" |
Webatuck 2 | 41°48'44.22" | 73°31'28.32" |
Webatuck 3 | 41°49'20.77" | 73°30'59.16" |
TABLE A2. Densities of crayfish (all species, no./m²) at a subset of the study sites in 2001 (unpublished data of Strayer and Klocker 2004) and 2009 (this study). "*" = site on lower Neversink studied in 2001 was not exactly at the 2009 study site.
Site | Density (2009) | Density (2001) |
Webatuck 1 | 1.72 | 1.74 |
Shawangunk 1 | 1.10 | 0.70 |
Neversink 1 | 0 | 0* |
Delaware 1 | 0 | 0.05 |
TABLE A3. Interstitial water chemistry and amount of fine sediments at a subset of the study sites, 2009 vs. 2010.
Site | Fine sediments (%, 2009) |
Fine sediments (%, 2010) |
Dissolved oxygen (% saturation, 2009) |
Dissolved oxygen (% saturation, 2010) |
Un-ionized ammonia (µg-N/L, 2009) |
Un-ionized ammonia (µg-N/L, 2010) |
Webatuck 1 | 14.1 | 29.2 | 4.2 | 3.3 | 1.12 | 1.13 |
Shawangunk 1 | 18.4 | 18.9 | 5.2 | 3.5 | 0.58 | 0.57 |
Croton 1 | 35.3 | 20.8 | 4 | 5.4 | 0.14 | 1.30 |
Neversink 2 | 10.8 | 9.2 | 11.0 | 13.2 | 0.04 | 0.05 |
Delaware 1 | 4.1 | 3.1 | 15.1 | 37.0 | 0.10 | 0.10 |
TABLE A4. Interstitial water chemistry (means, with range in parentheses) and temperature (in peeper at time of collection) at the study sites in 2009.
Site | Temperature (°C) | pH | Total ammonia (µg-N/L) |
Neversink 1 | 20.8 (20.7–21.1) | 6.07 (5.76–6.25) | 51.9 (9.3–76.2) |
Neversink 2 | 19.2 (17.8–20.1) | 6.04 (5.57–7.01) | 53.8 (4.7–262.2) |
Delaware 1 | 21.2 (20.8–21.5) | 6.51 (6.35–6.79) | 55.6 (17.3–93.5) |
Delaware 2 | 21.5 (20.7–22.2) | 6.11 (5.17–7.24) | 58.9 (10.2–150.5) |
Delaware 3 | 18.7 (18.2–19.2) | 6.41 (5.64–7.17) | 59.8 (14.2–153.1) |
Delaware 4 | 18.2 (17.8–18.7) | 5.74 (5.31–6.35) | 42.9 (8.2–174.7) |
Delaware 5 | 17.2 (17.0–17.7) | 6.55 (6.29–6.85) | 33.7 (13.6–94.4) |
Croton 1 | 21.2 (18.1–24.3) | 7.53 (7.08–7.72) | 9.5 (2.9–21.6) |
Croton 2 | 23.4 (19.6–25.4) | 6.92 (6.73–7.1) | 50.3 (5.5–100.1) |
Shawangunk 1 | 24.0 (23.5–25.8) | 6.37 (5.74–6.69) | 337.7 (21.7–1658.5) |
Shawangunk 2 | 25.8 (25.3–26.0) | 6.59 (6.40–6.71) | 80.4 (20.9–141.5) |
Webatuck 1 | 22.3 (17.9–23.3) | 7.49 (7.14–7.84) | 85.3 (6.3–525.6) |
Webatuck 2 | 22.0 (18.1–24.0) | 7.59 (7.38–7.85) | 17.1 (5.8–38.8) |
Webatuck 3 | 23.2 (21.2–24.3) | 7.42 (6.86–7.95) | 97.5 (2.4–646.6) |