Aims of this site
This site and blog is mostly about the science of rivers, although it will include cultural aspects of rivers when they catch my eye and take my fancy. It will highlight ideas, concepts and research of interest to students, researchers and managers.
Comments, corrections and additions are encouraged.
Enquiries to: firstname.lastname@example.org
PhD Project: ‘Stuffed Murray cod in pubs: trophy fish and environmental change in the Murray-Darling Basin’
There is an exciting opportunity to carry out a PhD project in the School of Environmental Sciences, Charles Sturt University, Albury, on the topic of historical river ecology. You will investigate aspects of the ecological, genetic and/or cultural significance of taxidermied Murray cod in pubs around the Murray-Darling Basin. There will be opportunities for travel and visiting some of Australia’s most iconic watering-holes. Potential candidates will need a First Class Honours, Masters degree or equivalent.
For more information, contact Dr Paul Humphries, Charles Sturt University: Email: email@example.com; Phone: 02 60519920; or go to the ILWS website.
Some time ago, on a warm Friday afternoon, when my mind was wandering, I was gazing vaguely at some flow graphs, trying to prepare for a lecture for my River Ecology class the following Monday. The flow graphs were from a variety of river systems around the world. Some of the rivers, like the Amazon and Mississippi, had very regular ups and downs, like a regular heartbeat. Others, like the Darling and Cooper Creeks, had some serious irregularities. But it also occurred to me that the patterns of flow looked not unlike the top part of a sound wave. You know the one – like you see when they play a voice recording on the television, to give you some visuals with the sound. It was then the seed of an idea began to germinate. Continue reading
The news arrived yesterday that one of Australia’s leading river ecologists, and also one of the most generous, kind and wise men I have known, died unexpectedly on Saturday 27 February. Keith Walker’s work in rivers spanned more than 40 years, much of it in the Murray-Darling Basin. For many, he was ‘Mr Murray’, because of his vast experience and knowledge of that river. He lectured and researched at the University of Adelaide for more than 30 years, and was fortunate enough to work (and publish) with Bill Williams, Jim Puckridge and many, many others. Keith edited The Ecology of River Systems (1986) with Bryan Davies and was an editor of River Research and Applications for twenty years. Keith sat on many, many committees advising on environmental issues and published more than 200 peer-reviewed and other articles. He had a long interest in freshwater mussels, and was always very happy to discuss these neglected, but important, animals. I was extremely fortunate to work closely with Keith, when we co-edited our book Ecology of Australian Freshwater Fishes (2013). His strength, tenacity and wisdom during those years, I will never forget. I learned so much, and was grateful every day to have his experience and gift for writing to guide us. His encouragement and enthusiasm never flagged, even when faced with the most recalcitrant of authors. All of those who knew Keith will miss him terribly. But we will also be grateful every day for knowing, and working with, a man such as him.
By Brendan Ebner, Tropical Landscapes Joint Venture, CSIRO Land & Water and TropWATER, James Cook University, Townsville, QLD.
Freshwater ecosystems are some of the most threatened on the planet. Freshwater fish are particularly imperilled: worldwide, 46% of all fish species are considered to be at risk of extinction by the International Union for the Conservation of Nature. It’s a very sobering thought that things are in such a bad state. But scientists, conservationists and natural resource managers are working hard to try to turn this around. One of the fundamental needs for all of this work is to determine the population size and distribution of fishes in rivers, and especially those fishes that are rare. Common ones are relatively easy to find, as any fisher will tell you. But it is the rare species – and these are often the ones that are at greatest risk of extinction – that we want to know most about, but are the hardest to find. It is an issue that fish ecologists have been grappling with for years. Interestingly, progress is being made, and increasingly includes a mix of low-tech and high-tech solutions. Continue reading
Anthropocene Baselines: Assessing Change and Managing Biodiversity in Human-Dominated Aquatic Ecosystems
A recent paper in BioScience, co-authored by Keller Kopf, Max Finlayson, myself (all Charles Sturt University), Neil Sims (CSIRO Land and Water) and Sally Hladyz (Monash University), sets out to ask: how can we measure change in human-dominated freshwater ecosystems, given that most are unlikely to be able to be restored to historical conditions? We propose the new concept of Anthropocene Baselines. This concept recognises that remnants of historical ecosystems have great value, in all senses, but socio-economic and/or ecological constraints commonly prevent complete restoration. If it is not appropriate to measure change relative to an unachievable historical baseline, what do we do about this? To find out, read the whole article here.