Biodiversity Blitzblitz Environment and Natural Resources Vovollunteer Newsletternewsletter——Especialespecial Editionedition
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NorthernNorthern andand YorkeYorke RegionRegion Department of BiodiversityBiodiversity BlitzBlitz Environment and Natural Resources VoVollunteer NewsletterNewsletter——EspecialEspecial EditionEdition Surveys during fall pit in Captured O’Brien Casey Possum Photo: Pygmy Message from the Yorke District Staff! The Innes National Park Biodiversity Blitz provided a wonderful opportunity to showcase the parks rich diversity of plant and animal life. During the event, volunteers and staff had the opportunity to work side by side to undertake a variety of survey and vegetation management activities and the results were outstanding. Through working together and learning from each other, we were able to take photos of the elusive Western Whipbird, discover active Mallefowl nests, trap tiny Pygmy Possums and identify pairs of Hooded Plovers while enjoying stunning coastal scenery. I would like to sincerely thank each individual volunteer who attended the Biodiversity Blitz, assisted in the collection of invaluable information on a variety of endangered species, and shared with us their stories. A particular highlight for me was seeing a large number children and adults who have had lim‐ ited opportunity to be involved in this type of work, get out and get dirty. I look forward to seeing each of you again in the park, whether it be as a volunteer or visitor enjoying the spectacular scenery, camp‐ ing, surfing or fishing opportunities that Innes National Park has to offer. Yours Sincerely Justin Holmes District Ranger, Yorke 1 Small Mammals and Reptiles……………………….. By David Armstrong Summary of reptile and mammal records obtained during the Bio Blitz at Innes NP 9‐14/10/2011 Cole©11 Chad line Total fall IB IBB00201 Op IBB00401 IBB00501 IBB00601 IBB00101 IBB00301 Photo: Pit B0 IBB IBB IBB IBB0 IBB porOpportunistic 01 002 003 004 050 006 tun 01 01 01 01 1 01 e Total COMMON NAME SPECIES NAME Reptiles Ctenophorus Prickly Dragon chapmani 1 1 1 3 Yellow‐faced Whip Demansia Snake psammophis 1 1 Diplodactylus South Coast Gecko calcicolus 2 2 4 Four‐toed Earless Skink Hemiergis peronii 3 1 3 2 9 Southern Four‐toed Slider Lerista dorsalis 1 1 2 Bull Skink Liopholis multiscutata 4 4 Dwarf Skink Menetia greyi 2 1 3 2 2 1 11 Mallee Snake‐eye Morethia obscura 2 1 3 Eastern Bearded Dragon Pogona barbata 1 1 Common Scaly‐foot Pygopus lepidopodus 1 1 Pseudonaja Peninsula Brown Snake inframacula 1 1 2 Sleepy Lizard Tiliqua rugosa 1 1 2 43 Mammals Western Pygmy‐ possum Cercartetus concinnus 7 10 3 5 1 3 29 Chocolate Wattled Bat Chalinolobus morio 2 4 6 Western Grey Kangaroo Macropus fuliginosus 2 2 1 5 House Mouse Mus musculus * 3 4 1 4 4 3 19 Rabbit (European Oryctolagus cuniculus Rabbit) * 1 1 Black Rat Rattus rattus * 2 1 3 63 * = feral or introduced species 2 REPTILES Although not possessing the level of reptile diversity of the arid and tropical parts of Australia, the species recorded in Innes NP are significant in that many have restricted and fragmented distributions in coastal areas and off‐shore is‐ lands, existing as a series of isolated populations. The mainland populations of a few are concentrated on lower Yorke and Eyre peninsulas. This is particularly evident for the two large venomous snakes, which are common in the Park, the black form of the Eastern Tiger Snake (Notechis scutatus) and the Peninsula Brown Snake (Pseudonaja in‐ framacula), one of which was caught in an Elliot trap during the Bio Blitz. Other species in this category, observed during Bio Blitz were Prickly Dragon (Ctenophorus chapmani), Bull Skink (Liopholis multiscutata) and South Coast Gecko (Diplodactylus calcicolus). This isolation was created by the South Coast Gecko increasing aridity of the Australian continent and associated Photo: Paul Williams rising sea level over the last 10, 000 ‐15,000 years. Previously these and other species would have been present to the edge of the continental shelf and further inland. Due to cooler weather than usual for the time of year, which restricts or prevents reptile activity, the Bio Blitz observed or trapped only 12 of the 23 reptile species officially recorded for Innes NP. However, this number may soon be increased by sightings of what is most likely Rosenberg’s Goanna (Varanus rosenbergi) reported by park staff. This is most likely the result of fox baiting reducing the numbers of both a predator and competitor of these large lizards. MAMMALS Most outstanding amongst the mammal records collected was the number of Western Pygmy‐possums in pitfall traps. These accounted for 29 (almost half) of the total of 63 mammals recorded. Of the 29 caught 24 were processed (weighed, sexed and marked) before release. There was a strong bias towards young males, with 19 males weighing from 6 to 10 gm (avg. 8.1 gm) and five females from 7 to 14.5 gm (avg. 10.4gm). Only the largest female at 14.5 gm was carrying pouch young. None of the 24 pygmy‐possums marked were recaptured, most likely indicating that they are highly mobile, rather than occupying fixed territories. The significant bias towards capture of young males may indicate that as the least critical individuals to the ongoing survival of the population, they are the most mobile, being kept on the move by larger individuals. It seems clear that Western Pygmy‐possums are the only small native partly ground dwelling mammal still existing within the park. Sub‐fossil remains (bones) from owl‐pellets retrieved from coastal caves or blown out sand dunes have provided evidence of the previous oc‐ currence in the area of 15 other mammal species, varying in size from small (mouse sized) rodents to Tam‐ mar Wallabies. Whilst the Tammar has been recently reintroduced, none of the others presently occur on Yorke Peninsula, although almost all still exist in other locations somewhere in Australia. Pygmy Possum *It is worth noting that no sightings or sign of foxes were Photo: Keith Baseley for Greening Australia, SA reported during the Bio Blitz. 3 3 Bio Blitz from an old volunteer perspective…………. By Jim Scott Having been on a couple of surveys in the past few years Joan and I thought we could enjoy another look at a part of the state. So we packed our van and set off for a 3 hour journey travelling through the fertile farm land of Yorke Peninsula. On arrival we were met by the smile on Cristina's face and directed to the camping ground just a couple of hundred metres from the Base Camp ‐The hall where most would bed down in virtual comfort with kitchen , hot showers , solid roof and smiling faces. At the first mealtime we were greeted by Caroline who fed us very well for the duration. Food is a great joy these days! On the following morning we were up bright and early for an 8:00 am start which became 9:00 am for the rest of the week. Over the 5 days (we could not make the whole week) we took part in a variety of completely different tasks in order to compile a list of flora and fauna in anticipation of a fuel reduction burn next autumn. Setting trap lines in designated areas and surveying the lines in the mornings, doing bird surveys in the bush, doing searches for hooded plovers on some magnificent beaches, weeding bridal veil infestations under the bushes (with ticks in residence) and learning of the indigenous perspective and history of the area. The trap lines were a familiar job having had the experience from earlier surveys but sometimes one is not prepared for the results. On the first morning we caught a couple of mice and on the third hole the cry went out “Pygmy Possums” and sure enough the captive was a possum with face and tail and whiskers but oh so much smaller than we were expecting. The captured animals were released at dusk so they were not in the sight of winged predators. Well worth the days effort! The next day was Hooded plovers ‐again not what we were expecting. Supposed to be rare but on every beach a pair had staked a claim whilst on one beach we sighted 9?? The beaches were a test for hikers though the sand being soft even at the waters edge which after a couple of hours tests the legs, the heart and the mind but all well worth the test but most of us chickened when one of the party said “I lost my binoculars” and no‐one breathed for a while. Our admiration of the rangers went up a fair bit when one volunteered to go in search of them, finding them at the extreme end of our survey. In all we were impressed by the sightings of mallee fowl, Tamar wallabies which had been relocated from New Zealand (Thanks for the talk on the project Andy) and proliferation of emu chicks due to the good seasons and fox baiting programs. As well as the fauna, the flora was quite varied and different to our locality. One other day we were taken on a tour of the park by one of the indigenous guides to observe the areas of importance and to be aware of such sites as water points camping sites and culturally important flora as well a learning of the origins before man arrived. Quite an enlightening session for people who had not had previous experience in the local history. Possibly though, the most enjoyable part of the week, was the social interaction between the people. They came from many interesting and various occupations ‐medical students, environmental engineers, rangers, retirees, young children, doctors, retired army veterans, park volunteers members of the Department of Environment and Natural Resources – as well as different nationalities, Spanish, Malaysian, Turkish, English, Uzbekistanian, Australian for example and the ages ranged from 73 down to about 3.