Friday, 27 August 2010

Floating Islands Reserve, Part 2

Re the final sentence in yesterday's blog:

This morning we checked the mammal traps again and success - another house mouse and a Swamp Rat Rattus lutreolus. Trevor was very pleased. "How do you know it's not a Bush Rat?" he was asked. Apparently the Swamp Rat is an overall brown colour and it has a stubby nose. The hind foot colour (Bush Rat, pale and Swamp Rat, dark) and the proportion of tail-to-body length are also important.  Later we found an extensive tunnel and runway system and set another trap nearby in the hope of catching another Swamp Rat.



Floating Islands Reserve

Whenever we travelled to Melbourne when I was a kid dad would stop half way for a break at Floating Islands Reserve in Stony Rises near Colac. It's about an hour west of Geelong.

The islands in the little lake really did float, blown around by the wind. They weren't small either - they had trees growing on them. The theory is that in 1952, a very wet year, the lake filled and some peat detached from the bottom of the swamp. The reserve still exists but the islands no longer float because the lake dried out. The trees have now rooted into the lake bed.


The Stony Rises is an area of basalt rocks and swamps that was a lava flow in the recent past and, in parts, the original vegetation remains because it was so difficult to clear and farm. The flora in Floating Islands Reserve is relatively intact with an overstory of Eucalytus viminalis and Acacia melanoxylon.




This week we set up fifty mammal traps to see what what living there or, to be honest, I should say Trevor set up the Elliott Traps. He has the licence and the expertise. First he mixed up a mess of oatmeal, peanut butter and Golden Syrup and rolled it into small balls. One ball was placed in each trap along with a crumpled sheet of paper towel to provide shelter. Each trap was placed in a likely spot roughly ten metres apart along a transept.



This morning we checked the traps - and found one house mouse, and one Dusky Antechinus. The latter was a female with young in her pouch which Trevor said was right and proper because the males all died a month or so ago after exhausting themselves during frenetic sexual activity and fighting. She was weighed, measured and released. Tomorrow morning we check the traps again.

Saturday, 21 August 2010

Minutiae

The more I learn the less I know. There are huge gaps in my knowledge of the natural world. And I'm forgetful as well so I've forgotten some of the things I know I used to know. Perhaps it would be better if I specialised, built up a supreme body of knowledge around one area, such as birds. But that would mean ignoring everything else and the world of nature is so interesting so that's not going to happen.

One day on our recent trip to Alice Springs Rosalind and I decided to have a rest (nap) after lunch to recharge the batteries. Helen, who is 'more senior' than both of us, announced that she wasn't going to be in that because she had fewer years in which to explore. What a great role model. (I still had a nap though.)

Here are some things I don't know anything about. We found minute lichens and liverworts (I think) growing in damp depressions in desert woodlands around Alice. Don't they look interesting?






Wednesday, 18 August 2010

Succulents

I'm back in cold Geelong after a week of beautiful week in central Australia but with lots of memories and images to sustain me. We live in an amazing country and exploring a small part of it with friends of similar mind was great fun.

We expected to see kangaroos but didn't see any, we expected to see emus but didn't see any. We expected to see lizards but only saw three. We saw very few insects despite the fact that there were so many plants flowering and seeding, we saw very few tracks in the sand and there were birds around but I thought I would see more honeyeaters. It's hard for a fleeting visitor to get a feel for what is 'normal' after a long drought but we got the impression that biodiversity isn't exactly normal in central Australia.

There has been a fantastic new book published focusing on Australian succulents, Australian Succulent Plants: An Introduction by Attila Kapitany, and a webpage that I must explore at  http://www.australiansucculents.com/ but in the meantime here are a few of the succulents we saw around Alice.