Analogous aquatic and terrestrial food webs in the high Arctic: the structuring force of a harsh climate

Rene van der Wal, Dag O. Hessen

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Understanding food web structure and dynamics remains a central theme in ecology. Whilst differences between aquatic and terrestrial food webs have been the focus of several studies, we aim to reveal similarities where abiotic conditions are particularly extreme such as in the high Arctic. We propose that here, the combination of a short growing season, low temperature and low light, leads to the absence of predator control and the development of typically two-trophic, grazer-dominated food webs with high plant quality in terms of elemental ratios. Moreover, we advocate that this mechanism is evident in both aquatic and terrestrial high-Arctic environments, allowing the build-up of herbivore densities that consume a large fraction of plant primary production and tightly recycle nutrients. Thus, the particular abiotic conditions that characterise the high Arctic give rise to a unique environment that allows biotic factors to orchestrate food web structure and influence ecosystem function. Specially, the short growing season, low temperatures and low light levels collectively constrain the accumulation of structural autotroph tissue that, in temperate regions, effectively keeps herbivores at bay. While fundamental differences between terrestrial and aquatic ecosystems have been frequently advocated, we show here that harsh live-constraining conditions in the high Arctic have led to analogous, grazer-dominated, food web dynamics in both terrestrial and freshwater ecosystems.
Original languageEnglish
Pages (from-to)231-240
Number of pages10
JournalPerspectives in plant ecology, evolution and systematics
Volume11
Issue number3
DOIs
Publication statusPublished - 2009

Fingerprint

soil food webs
aquatic food webs
food webs
food web
Arctic region
climate
herbivores
terrestrial ecosystem
growing season
herbivore
predator control
autotrophs
arctic environment
biotic factor
freshwater ecosystem
primary productivity
ecosystem function
temperature
aquatic ecosystem
primary production

Keywords

  • grazer control
  • light availability
  • predator control
  • Spitsbergen
  • temperature

Cite this

@article{eb68f69873964a0284305d4daf4524b6,
title = "Analogous aquatic and terrestrial food webs in the high Arctic: the structuring force of a harsh climate",
abstract = "Understanding food web structure and dynamics remains a central theme in ecology. Whilst differences between aquatic and terrestrial food webs have been the focus of several studies, we aim to reveal similarities where abiotic conditions are particularly extreme such as in the high Arctic. We propose that here, the combination of a short growing season, low temperature and low light, leads to the absence of predator control and the development of typically two-trophic, grazer-dominated food webs with high plant quality in terms of elemental ratios. Moreover, we advocate that this mechanism is evident in both aquatic and terrestrial high-Arctic environments, allowing the build-up of herbivore densities that consume a large fraction of plant primary production and tightly recycle nutrients. Thus, the particular abiotic conditions that characterise the high Arctic give rise to a unique environment that allows biotic factors to orchestrate food web structure and influence ecosystem function. Specially, the short growing season, low temperatures and low light levels collectively constrain the accumulation of structural autotroph tissue that, in temperate regions, effectively keeps herbivores at bay. While fundamental differences between terrestrial and aquatic ecosystems have been frequently advocated, we show here that harsh live-constraining conditions in the high Arctic have led to analogous, grazer-dominated, food web dynamics in both terrestrial and freshwater ecosystems.",
keywords = "grazer control, light availability, predator control, Spitsbergen, temperature",
author = "{van der Wal}, Rene and Hessen, {Dag O.}",
year = "2009",
doi = "10.1016/j.ppees.2009.03.003",
language = "English",
volume = "11",
pages = "231--240",
journal = "Perspectives in plant ecology, evolution and systematics",
issn = "1433-8319",
publisher = "Urban und Fischer Verlag Jena",
number = "3",

}

TY - JOUR

T1 - Analogous aquatic and terrestrial food webs in the high Arctic

T2 - the structuring force of a harsh climate

AU - van der Wal, Rene

AU - Hessen, Dag O.

PY - 2009

Y1 - 2009

N2 - Understanding food web structure and dynamics remains a central theme in ecology. Whilst differences between aquatic and terrestrial food webs have been the focus of several studies, we aim to reveal similarities where abiotic conditions are particularly extreme such as in the high Arctic. We propose that here, the combination of a short growing season, low temperature and low light, leads to the absence of predator control and the development of typically two-trophic, grazer-dominated food webs with high plant quality in terms of elemental ratios. Moreover, we advocate that this mechanism is evident in both aquatic and terrestrial high-Arctic environments, allowing the build-up of herbivore densities that consume a large fraction of plant primary production and tightly recycle nutrients. Thus, the particular abiotic conditions that characterise the high Arctic give rise to a unique environment that allows biotic factors to orchestrate food web structure and influence ecosystem function. Specially, the short growing season, low temperatures and low light levels collectively constrain the accumulation of structural autotroph tissue that, in temperate regions, effectively keeps herbivores at bay. While fundamental differences between terrestrial and aquatic ecosystems have been frequently advocated, we show here that harsh live-constraining conditions in the high Arctic have led to analogous, grazer-dominated, food web dynamics in both terrestrial and freshwater ecosystems.

AB - Understanding food web structure and dynamics remains a central theme in ecology. Whilst differences between aquatic and terrestrial food webs have been the focus of several studies, we aim to reveal similarities where abiotic conditions are particularly extreme such as in the high Arctic. We propose that here, the combination of a short growing season, low temperature and low light, leads to the absence of predator control and the development of typically two-trophic, grazer-dominated food webs with high plant quality in terms of elemental ratios. Moreover, we advocate that this mechanism is evident in both aquatic and terrestrial high-Arctic environments, allowing the build-up of herbivore densities that consume a large fraction of plant primary production and tightly recycle nutrients. Thus, the particular abiotic conditions that characterise the high Arctic give rise to a unique environment that allows biotic factors to orchestrate food web structure and influence ecosystem function. Specially, the short growing season, low temperatures and low light levels collectively constrain the accumulation of structural autotroph tissue that, in temperate regions, effectively keeps herbivores at bay. While fundamental differences between terrestrial and aquatic ecosystems have been frequently advocated, we show here that harsh live-constraining conditions in the high Arctic have led to analogous, grazer-dominated, food web dynamics in both terrestrial and freshwater ecosystems.

KW - grazer control

KW - light availability

KW - predator control

KW - Spitsbergen

KW - temperature

U2 - 10.1016/j.ppees.2009.03.003

DO - 10.1016/j.ppees.2009.03.003

M3 - Article

VL - 11

SP - 231

EP - 240

JO - Perspectives in plant ecology, evolution and systematics

JF - Perspectives in plant ecology, evolution and systematics

SN - 1433-8319

IS - 3

ER -