Ecological Archives A022-095-A1

David L. Strayer and Heather M. Malcolm. 2012. Causes of recruitment failure in freshwater mussel populations in southeastern New York. Ecological Applications 22:1780–1790. http://dx.doi.org/10.1890/11-1536.1

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 Densities of crayfish (all species, no./m²) at a subset of the study sites in 2001 (unpublished data of Strayer and Klocker 2004) and 2009 (this study).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)

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