Osprey Population Increase along the Willamette River, Oregon, and the Role of Utility Structures, 1976–93

Henny, Charles J.; Kaiser, James L.

doi:10.1016/b978-012100130-8/50014-6

Cited by 21 publications

(32 citation statements)

References 9 publications

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“…But even more importantly, it has been established in modern resource management that Osprey populations respond strongly and effectively to the availability of adequate, stable nest sites and abundant food (Poole 1989a, b, Henny andKaiser 1996); and grebe populations respond best if protected from disturbances and other man-induced perturbations (see Anonymous 1999). At Clear Lake, there was a continuing positive relationship between nesting Ospreys and the local power company.…”

Section: Discussionmentioning

confidence: 99%

“…From 1976 to 1993, Henny and Kaiser (1996) documented an increase from 13 to 78 active pairs. In 1993, the Oregon population produced an average of 1.64 YY/NA, although the nesting population had undergone an exponential rate of increase since 1976, very similar to the population expansion of a smaller size at Clear Lake.…”

Section: Fig 2 Adultmentioning

confidence: 99%

“…Recently, Henny and Kaiser (1996) studied an expanding Osprey population in the Willamette Valley of Oregon, quite similar to the Clear Lake population in that it was recently increasing from previous (organochlorine) pollution-related decimations (Poole et al 2002), expanding into new habitat, and apparently not yet proximally limited by either nest site availability or food levels. From 1976 to 1993, Henny and Kaiser (1996) documented an increase from 13 to 78 active pairs.…”

Section: Fig 2 Adultmentioning

confidence: 99%

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Mercury Residues and Productivity in Osprey and Grebes From a Mine‐dominated Ecosystem

Anderson

Suchanek

Eagles‐Smith

et al. 2008

Ecological Applications

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Grebe productivity at Clear Lake improved from ;0.1 to 0.5 fledged young per adult during the latter part of the study when human disturbance was prevented. At that period in time, improved productivity did not differ from our reference site at Eagle Lake. Human disturbance, however, as a co-factor made it impossible to evaluate statistically subtle Hg effects on grebe productivity at Clear Lake. Osprey reproduced sufficiently to maintain increasing breeding numbers from 1992 to 2006. Mercury in Clear Lake water, sediments, invertebrates, and fish did not decline from 1992 to 2003, but a shift in trophic structure induced by an introduced planktivorous fish species may have caused significant alterations in Hg concentrations in several species of prey fishes that may have produced concomitant changes in Osprey and grebe Hg exposure. The temporary declines observed in grebe and Osprey feather residues in the late 1990s, with coincidental improvements in reproductive performance, however, could not be attributed to remediation at the mine site.

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Section: Discussionmentioning

confidence: 99%

Section: Fig 2 Adultmentioning

confidence: 99%

Section: Fig 2 Adultmentioning

confidence: 99%

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Mercury Residues and Productivity in Osprey and Grebes From a Mine‐dominated Ecosystem

Anderson

Suchanek

Eagles‐Smith

et al. 2008

Ecological Applications

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“…Only one BMF estimate was made for each contaminant, and it only represented samples (eggs and fish) collected from the Upper River. The osprey population nesting on the main stem Willamette River and lower Santiam River (hereafter, Santiam River) increased from 13 pairs in 1976 to 78 pairs in 1993 (Henny and Kaiser 1996) to 234 pairs in 2001 (Henny et al 2002a), including an expansion of the local breeding range downstream into the heavily industrialized harbor area of Portland. In 2001, we collected and analyzed additional osprey eggs and prey fish species from the Santiam River and further downstream in Newberg Pool and Tidal Portland (Fig.…”

mentioning

confidence: 99%

PCDDs, PCDFs, PCBs, OC pesticides and mercury in fish and osprey eggs from Willamette River, Oregon (1993, 2001 and 2006) with calculated biomagnification factors

2008

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The osprey (Pandion haliaetus) population nesting along the main stem Willamette River and lower Santiam River was first studied to evaluate contaminants and reproductive rates in 1993 when 78 occupied nests were present. By 2001, the population increased to 234 occupied nests, a 13.7% annual rate of population increase. A sample egg was collected from each of a series of nests along the Upper River (river mile 55-187) in 1993, 2001 and 2006 to evaluate trends of persistent contaminants (organochlorine [OC] pesticides, polychlorinated biphenyls [PCBs], polychlorinated dibenzo-p-dioxins [PCDDs], and polychlorinated dibenzofurans [PCDFs]). Nearly all OC pesticide residues decreased significantly, e.g., p, p'-DDE (DDE) from 2,350 to 1,353 to 210 microg/kg wet weight (ww). PCBs followed a similar pattern over time, e.g., SigmaPCBs 688 to 245 to 182 microg/kg ww, while PCDDs and PCDFs showed a more precipitous decline (often 85-95%) between 1993 and 2001, with no egg analyses warranted in 2006. During 2001-2002, sample osprey eggs were also collected from nests at three Headwater Reservoirs and two lower reaches (Newberg Pool and Tidal Portland) of the Willamette River, as well as the lower portion of the Santiam River to evaluate spatial residue patterns. Significant differences were seldom detected among the different sampling areas for OC pesticides (probably due to small sample sizes), although higher concentrations were often seen in the lower reaches, e.g., DDE 901 microg/kg ww (Headwater Reservoirs), 1,353 (Upper River), 1,384 (Newberg Pool) and 2,676 (Tidal Portland). PCB congener concentrations in eggs were usually higher in the Tidal Portland reach than at other locations and often significantly higher than at the Headwater Reservoirs or Upper River. Mercury (first analyzed in eggs in 2001), PCDDs and PCDFs were extremely low in 2001/2002 with no significant spatial patterns. Whole fish composite samples of largescale sucker (Catastomus macrocheilus) and northern pikeminnow (Ptychocheilus oregonensis), which account for about 90% of the biomass in the diet of this osprey population, were also collected from the Willamette River in 1993 and 2001 and analyzed for the same contaminants as osprey eggs. Contaminant residues in fish from the Upper River decreased between 1993 and 2001, paralleling findings for osprey eggs. Likewise, spatial patterns for fish residues paralleled findings for osprey eggs from the different reaches in 2001. A second empirical estimate of biomagnification factors (BMFs) from fish to osprey eggs for OC pesticides, PCBs, PCDDs and PCDFs (ww and lipid weight [lw] basis) was calculated based on residue data collected in 2001. The two independent BMF estimates (1993 and 2001) for each contaminant from the Upper River provide a measure of consistency, e.g., DDE (ww) 87 and 79, (lw) 103 and 112; SigmaPCBs (ww) 11 and 8.4, (lw) 13 and 12. Mercury did not biomagnify from fish to osprey eggs (BMF = 0.60). Legacy contaminants investigated had limited (perhaps only DDE), if any, effects on reprod...

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“…Гнездование скоп на опорах ЛЭП явля-ется распространенным явлением в США и странах зарубежной Европы (Cramp, Simmons, 1980;Hemke, 1983;Ruhle, 1985;Palmer, 1988;Poole, 1989;Meyburg et al, 1995;Henny, Kaiser, 1996;Ewins, 1996;1997;Mebs, Schmidt, 2014), одна-ко в России такие случаи единичны и из-вестны лишь в бассейне Волги (Бакка и др., 2008; Динкевич, 2011; Карякин, 2016), а в Саянах до последнего времени вовсе не регистрировались.…”

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The First Record of Nesting of the Osprey on the High-voltage Power Pole in the Sayan Mountains, Russia

Karyakin¹,

Nikolenko²,

Prommer³

et al. 2017

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Osprey Population Increase along the Willamette River, Oregon, and the Role of Utility Structures, 1976–93

Cited by 21 publications

References 9 publications

Mercury Residues and Productivity in Osprey and Grebes From a Mine‐dominated Ecosystem

Mercury Residues and Productivity in Osprey and Grebes From a Mine‐dominated Ecosystem

PCDDs, PCDFs, PCBs, OC pesticides and mercury in fish and osprey eggs from Willamette River, Oregon (1993, 2001 and 2006) with calculated biomagnification factors

The First Record of Nesting of the Osprey on the High-voltage Power Pole in the Sayan Mountains, Russia

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