Tracking Nutrient Routing in Avian Consumers in a Subtropical Desert

L. Gerardo Herrera M. (Corresponding Author), Jazmin Osorio M.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The nutrients animals ingest are allocated to serve different functions. We used contrasting C stable isotope signatures of dominant vegetation types in a North American subtropical desert to decipher how avian consumers allocate nutrients to fuel oxidative metabolism and to construct tissues. We conducted C stable isotope analysis of breath and feathers collected from nectarivores (hummingbirds) and of breath, plasma, and red blood cell samples collected from frugivores, granivores, and insectivores. Based on varying nutrient characteristics of food sources, we expected that for frugivores and granivores, CAM-derived food (RCCAM) would have similar importance for oxidative metabolism and for tissue building, that RCCAM in nectarivores and insectivores would be more important for fueling metabolism than for generating tissues, and that (although low) RCCAM in insectivores would be higher for sustaining metabolism than for building tissues. Our predictions held true for nectarivores and granivores, but RCCAM use in tissue building was lower than expected in frugivores and higher than expected in insectivores. Our examination at the trophic guild, population, and individual levels showed that in general, nutrients used to sustain oxidative metabolism and tissue construction had a uniform isotopic origin. This finding suggests that the avian community under investigation does not route different food groups to fulfill different needs. However, we found some exceptions, indicating that birds can use different food sources for different functions, irrespective of trophic guild.
Original languageEnglish
Pages (from-to)255-264
Number of pages10
JournalBiotropica
Volume48
Issue number2
Early online date18 Jan 2016
DOIs
Publication statusPublished - Mar 2016

Fingerprint

routing
deserts
insectivore
insectivores
desert
nectar feeding
metabolism
frugivores
nutrient
aerobiosis
nutrients
food
guild
stable isotopes
stable isotope
hummingbirds
food groups
feather
feathers
vegetation types

Keywords

  • birds
  • stable isotopes
  • dry ecosystems
  • nutrient allocation
  • feeding habits

Cite this

Tracking Nutrient Routing in Avian Consumers in a Subtropical Desert. / Herrera M., L. Gerardo (Corresponding Author); Osorio M., Jazmin.

In: Biotropica, Vol. 48, No. 2, 03.2016, p. 255-264.

Research output: Contribution to journalArticle

Herrera M., L. Gerardo ; Osorio M., Jazmin. / Tracking Nutrient Routing in Avian Consumers in a Subtropical Desert. In: Biotropica. 2016 ; Vol. 48, No. 2. pp. 255-264.
@article{69b9c09c65f149029cdc6200138dc3b0,
title = "Tracking Nutrient Routing in Avian Consumers in a Subtropical Desert",
abstract = "The nutrients animals ingest are allocated to serve different functions. We used contrasting C stable isotope signatures of dominant vegetation types in a North American subtropical desert to decipher how avian consumers allocate nutrients to fuel oxidative metabolism and to construct tissues. We conducted C stable isotope analysis of breath and feathers collected from nectarivores (hummingbirds) and of breath, plasma, and red blood cell samples collected from frugivores, granivores, and insectivores. Based on varying nutrient characteristics of food sources, we expected that for frugivores and granivores, CAM-derived food (RCCAM) would have similar importance for oxidative metabolism and for tissue building, that RCCAM in nectarivores and insectivores would be more important for fueling metabolism than for generating tissues, and that (although low) RCCAM in insectivores would be higher for sustaining metabolism than for building tissues. Our predictions held true for nectarivores and granivores, but RCCAM use in tissue building was lower than expected in frugivores and higher than expected in insectivores. Our examination at the trophic guild, population, and individual levels showed that in general, nutrients used to sustain oxidative metabolism and tissue construction had a uniform isotopic origin. This finding suggests that the avian community under investigation does not route different food groups to fulfill different needs. However, we found some exceptions, indicating that birds can use different food sources for different functions, irrespective of trophic guild.",
keywords = "birds, stable isotopes, dry ecosystems, nutrient allocation, feeding habits",
author = "{Herrera M.}, {L. Gerardo} and {Osorio M.}, Jazmin",
note = "Funding Information: Consejo Nacional de Ciencia y Tecnolog{\'i}a (CONACyT). Grant Numbers: #43343, 100035, #57262, 18970 Secretar{\'i}a de Medio Ambiente y Recursos Naturales. Grant Number: #2082",
year = "2016",
month = "3",
doi = "10.1111/btp.12274",
language = "English",
volume = "48",
pages = "255--264",
journal = "Biotropica",
issn = "0006-3606",
publisher = "Wiley-Blackwell",
number = "2",

}

TY - JOUR

T1 - Tracking Nutrient Routing in Avian Consumers in a Subtropical Desert

AU - Herrera M., L. Gerardo

AU - Osorio M., Jazmin

N1 - Funding Information: Consejo Nacional de Ciencia y Tecnología (CONACyT). Grant Numbers: #43343, 100035, #57262, 18970 Secretaría de Medio Ambiente y Recursos Naturales. Grant Number: #2082

PY - 2016/3

Y1 - 2016/3

N2 - The nutrients animals ingest are allocated to serve different functions. We used contrasting C stable isotope signatures of dominant vegetation types in a North American subtropical desert to decipher how avian consumers allocate nutrients to fuel oxidative metabolism and to construct tissues. We conducted C stable isotope analysis of breath and feathers collected from nectarivores (hummingbirds) and of breath, plasma, and red blood cell samples collected from frugivores, granivores, and insectivores. Based on varying nutrient characteristics of food sources, we expected that for frugivores and granivores, CAM-derived food (RCCAM) would have similar importance for oxidative metabolism and for tissue building, that RCCAM in nectarivores and insectivores would be more important for fueling metabolism than for generating tissues, and that (although low) RCCAM in insectivores would be higher for sustaining metabolism than for building tissues. Our predictions held true for nectarivores and granivores, but RCCAM use in tissue building was lower than expected in frugivores and higher than expected in insectivores. Our examination at the trophic guild, population, and individual levels showed that in general, nutrients used to sustain oxidative metabolism and tissue construction had a uniform isotopic origin. This finding suggests that the avian community under investigation does not route different food groups to fulfill different needs. However, we found some exceptions, indicating that birds can use different food sources for different functions, irrespective of trophic guild.

AB - The nutrients animals ingest are allocated to serve different functions. We used contrasting C stable isotope signatures of dominant vegetation types in a North American subtropical desert to decipher how avian consumers allocate nutrients to fuel oxidative metabolism and to construct tissues. We conducted C stable isotope analysis of breath and feathers collected from nectarivores (hummingbirds) and of breath, plasma, and red blood cell samples collected from frugivores, granivores, and insectivores. Based on varying nutrient characteristics of food sources, we expected that for frugivores and granivores, CAM-derived food (RCCAM) would have similar importance for oxidative metabolism and for tissue building, that RCCAM in nectarivores and insectivores would be more important for fueling metabolism than for generating tissues, and that (although low) RCCAM in insectivores would be higher for sustaining metabolism than for building tissues. Our predictions held true for nectarivores and granivores, but RCCAM use in tissue building was lower than expected in frugivores and higher than expected in insectivores. Our examination at the trophic guild, population, and individual levels showed that in general, nutrients used to sustain oxidative metabolism and tissue construction had a uniform isotopic origin. This finding suggests that the avian community under investigation does not route different food groups to fulfill different needs. However, we found some exceptions, indicating that birds can use different food sources for different functions, irrespective of trophic guild.

KW - birds

KW - stable isotopes

KW - dry ecosystems

KW - nutrient allocation

KW - feeding habits

U2 - 10.1111/btp.12274

DO - 10.1111/btp.12274

M3 - Article

VL - 48

SP - 255

EP - 264

JO - Biotropica

JF - Biotropica

SN - 0006-3606

IS - 2

ER -