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Hudson Bay Ecosystem: Past, Present, and Future

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A Little Less Arctic

Abstract

In order to gain insight into the dynamics of the Hudson Bay ecosystem as well as past and future states, an ecosystem model was created using a static Ecopath model to represent the present day ecosystem in Hudson Bay. Simulations of past and future ecosystem states were used to gain insight to key trophic linkages within the system, with focus on marine mammal populations. The past ecosystem was simulated by increasing ice algae and removing killer whales (Orcinus orca) from the system, which led to an increased biomass of all other groups within the model, excluding pelagic producers. Future states of Hudson Bay are presented in three scenarios representing various degrees of reported and predicted ecosystem changes including climate change and increased hunting pressure. All future scenarios show an overall decrease in species biomass, although some species are positively impacted by the changes in the system. Model simulations suggest bottom up forcing of ice algae is an important factor driving marine mammal biomass.

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Notes

  1. 1.

    Prior to 1981 statistics for Nunavut were combine with Northwest Territories.

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Correspondence to C. Hoover .

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Appendix

Appendix

Fish groupings for the Hudson Bay ecosystem modeled after Stewart and Lockhart (2005). Under the classification, only species found within Hudson and James Bays which spend at least part of their life in areas where they would be available to marine mammals were included. In Stewart and Lockhart (2005) these are classified as; Marine, Brackish, Estuarine, and some Diadromous.

Atlantic Salmon

 

Atlantic salmon

Salmo salar

Arctic Char

 

Arctic Char

Salvelinus alpines

Capelin

 

Capeli

Mallotus villosus

Gadiformes

 

Arctic cod

Boreogadus saida

Greenland cod

Gadus ogac

Polar cod

Arctogadus glacialis

Other Brackish Water Fish

 

Arctic shanny

Stichaeus punctatus

Canadian plaice

Hippoglossoides platessoides

Slender eelblenny

Lumpenus fabricii

Other Marine Fish

 

Alligator poacher

Leptagonus decagonus

Atlantic alligatorfish

Ulcina olriki

Atlantic Herring

Clupea harengus

Atlantic spiny lumpsucker

Eumicrotremus spinosus

Banded gunnel

Pholis fasciata

Daubed shanny

Leptoclinus maculatus

Dusky snailfish

Liparis gibbus

Fourline snakeblenny

Eumesogrammus praecisus

Gelatinous snailfish

Liparis fabricii

Kelp snailfish

Liparis tunicatus

Leatherfin lumpsucker

Eumicrotremus derjugini

Lumpfish

Cyclopterus lumpus

Sea tadpole

Careproctus reinhardti

Stout eelblenny

Anisarchus medius

Other Salmon

 

Arctic Char

Salvelinus alpinus

Brook trout

Salvelinus fontinalis

Lake cisco

Coregonus artedi

Lake whitefish

Coregonus clupeaformis

Round whitefish

Prosopium cylindraceum

Sandlance

 

Northern sand lance

Ammodytes dubius

Stout sand lance

Ammodytes hexapterus

Sculpins/Zoarcids

 

Arctic eelpout

Lycodes reticulatus

Arctic sculpin

Myoxocephalus scorpiodes

Arctic staghorn

Gymnocanthus tricuspis

Fish doctor

Gymnelus viridis

Fourhorn sculpin

Myoxocephalus quadricornis

Moustache sculpin

Triglops murrayi

Pale eelpout

Lycodes pallidus

Ribbed sculpin

Triglops pingelli

Shorthorn sculpin

Myoxocephalus scorpius

Spatulate sculpin

Icelus spatula

Twohorn sculpin

Icelus bicornis

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Hoover, C. (2010). Hudson Bay Ecosystem: Past, Present, and Future. In: Ferguson, S.H., Loseto, L.L., Mallory, M.L. (eds) A Little Less Arctic. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9121-5_11

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