+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

Physiological condition of juvenile wading birds in relation to multiple landscape stressors in the Florida Everglades: effects of hydrology, prey availability, and mercury bioaccumulation



Physiological condition of juvenile wading birds in relation to multiple landscape stressors in the Florida Everglades: effects of hydrology, prey availability, and mercury bioaccumulation



Plos One 9(9): E106447



The physiological condition of juvenile birds can be influenced by multiple ecological stressors, and few studies have concurrently considered the effects of environmental contaminants in combination with ecological attributes that can influence foraging conditions and prey availability. Using three temporally distinct indices of physiological condition, we compared the physiological response of nestling great egrets (Ardea alba) and white ibises (Eudocimus albus) to changing prey availability, hydrology (water depth, recession rate), and mercury exposure in the Florida Everglades. We found that the physiological response of chicks varied between species and among environmental variables. Chick body condition (short-term index) and fecal corticosterone levels (medium-term) were influenced by wetland water depth, prey availability, region, and age, but not by mercury contamination. However, mercury exposure did influence heat shock protein 70 (HSP70) in egret chicks, indicating a longer-term physiological response to contamination. Our results indicate that the physiological condition of egret and ibis chicks were influenced by several environmental stressors, and the time frame of the effect may depend on the specialized foraging behavior of the adults provisioning the chicks.

(PDF emailed within 0-6 h: $19.90)

Accession: 055001556

Download citation: RISBibTeXText

PMID: 25184221

DOI: 10.1371/journal.pone.0106447


Related references

Landscape factors and hydrology influence mercury concentrations in wading birds breeding in the Florida Everglades, USA. Science of the Total Environment 458-460: 637-646, 2014

Effects of environmental mercury exposure on reproduction, health and survival of wading birds in the Florida Everglades. 1997

Part 2: The Effects of Multiple Stressors on Freshwater and Marine Ecosystems || The Effect of Multiple Stressors on the Florida Keys Coral Reef Ecosystem: A Landscape Hypothesis and a Physiological Test. Limnology and Oceanography 44(3): 941-949, 1999

Reproductive ecology of wading birds in relation to water conditions in the Florida Everglades. 1988

SOURCES OF VARIATION IN DETECTION OF WADING BIRDS FROM AERIAL SURVEYS IN THE FLORIDA EVERGLADES (Fuentes de Variacin en la Deteccin de Aves Vadeadoras mediante Censos desde el Aire en los Everglades de Florida). Auk 125(3): 731-743, 2008

Foraging habitat selection among wading birds (Ciconiiformes) at Lake Okeechobee, Florida, in relation to hydrology and vegetative cover. Ergebnisse der Limnologie 0(45): 247-285, 1995

The Effects of Prey Availability on the Numerical Response of Wading Birds. Ecological Monographs 72(3): 9-46, 2002

Feather mercury concentrations and physiological condition of great egret and white ibis nestlings in the Florida Everglades. Science of the Total Environment 407(8): 2641-2649, 2009

Sources of variation in detection of wading birds from aerial surveys in the Florida Everglades. Auk 125(3): 731-741, 2008

Use of path analysis to integrate the effects of multiple stressors on mercury contamination in the Everglades ecosystem. Pages B50 2002, 2002

Distribution of wading birds relative to vegetation and water depths in the northern Everglades of Florida, USA. Waterbirds 25(3): 265-277, September, 2002

The role of predation in determining reproductive success of colonially nesting wading birds in the florida everglades usa. Condor 91(4): 860-867, 1989

The role of predation in determining reproductive success of colonially nesting wading birds in the Florida Everglades. Condor, 914: 860-867, 1989

Relative availability of the prey of wading birds by day and by night. Marine Ecology Progress Series, 372-3: 103-107, 1987

Pulsed breeding of long-legged wading birds and the importance of infrequent severe drought conditions in the Florida Everglades. Wetlands ember; 21(4): 484-491, 2001