Please Note:

The Open Access Repository will be moving to a new authentication system on the 1st of November.

From this date onwards, account holders will be required to login using their University of Tasmania credentials.
If your current repository username differs from your University username, please email E.Prints@utas.edu.au so we can update these details on your behalf.

Due to the change, there will be a short outage of the repository from 9am on the morning of the 1st of November

Open Access Repository

Preliminary investigation into the stimulation of phytoplankton photophysiology and growth by whale faeces

Downloads

Downloads per month over past year

Smith, LV and McMinn, A and Martin, A and Nicol, S and Bowie, AR and Lannuzel, D and van der Merwe, P (2013) Preliminary investigation into the stimulation of phytoplankton photophysiology and growth by whale faeces. Journal of Experimental Marine Biology and Ecology, 446. pp. 1-9. ISSN 0022-0981

[img] PDF (JEMBE5005_Smith et al.pdf)
JEMBE50005[1]_L...pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.

Abstract

This study demonstrates that pygmy blue whale faeces stimulates the photosynthetic performance and
growth of three marine phytoplankton species, Dunaliella tertiolecta, Chaetoceros pendulus and Phaeocystis
antarctica. Photosynthetic and growth parameters were compared at four time-points over a 21 day experiment
with 6 different treatments: a positive control (F/2 culture media), a negative control (iron-deplete F/2
culture media), and four faecal treatments ranging from4375 to 220,267 μg faeces l−1. At each time point, rapid
light curves were generated using Pulse-Amplitude Modulated (PAM) fluorometry to obtain the parameters
maximum quantum yield (FV/FM), maximum relative electron transport rate (rETRmax), and photosynthetic efficiency
(α). Change in the relative abundance of microalgal cells and the concentration of chlorophyll a was also
determined periodically for each species. The chlorophyte D. tertiolecta and the diatomC. pendulus both exhibited
clear dose-dependent stimulation of photosynthetic and growth parameters within 7 days of incubation. There
was also a strong interaction between incubation period and treatment in C. pendulus cultures whichmay be
indicative of nutrient exhaustion following faecally-stimulated growth. The growth response observed for
P. antarctica was less variable with respect to faecal concentration. These findings are considered preliminary,
but illustrate that whales are a potentially important means of marine nutrient recycling.

Item Type: Article
Journal or Publication Title: Journal of Experimental Marine Biology and Ecology
Page Range: pp. 1-9
ISSN: 0022-0981
Identification Number - DOI: 10.1016/j.jembe.2013.04.010
Additional Information:

Copyright 2013 Elsevier

Date Deposited: 04 Nov 2013 03:22
Last Modified: 18 Nov 2014 04:56
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP