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As part of National Science Week, the Sydney Institute of Marine Science (SIMS) held sessions to raise public awareness about the fragile nature of seagrass meadows. Although this event was promoted as a Science event, it had clear links to the Geography syllabus - both the Year 10 Environmental Change and Management topic and the Year 9 - Biomes topic. SIMS is located on Chowder Bay Rd, Mosman. The session involved examining specimens form nearby Chowder Bay/Clifton Gardens, a tour of classroom facilities and a display of seawall panel designs. As information on the Great Southern Reef becomes more readily available, some of these activities would tie in really well with this case study of Geography classes.  Seagrass and seaweed - there was a collection aquatic organisms which could be identified using a field chart and also facilities to exam them under the microscope
Part of the day involved an art project to promote public awareness about seagrass. The artworks were transferred onto silks that had been dyed to represent seagrass. This became part of an installation at Mosman Art Gallery. You can read more about the art project here: https://www.lissfinney.com/public-projects
There was also a display of seawall panels designed by Living Seawalls. These panels are designed to be adhered to seawalls to encourage biodiversity. The crevices are intended to encourage aquatic species to use the structure as habitat. You can read about Living Seawalls here: https://www.livingseawalls.com.au/
There is a testing area where the Living Seawall panels are being tested in Chowder Bay. The shark nets at this site are also a common place for snorkelers to find seahorses.
I'm definitely coming back for a closer look.
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Fires around Port Macquarie, Lake Cathie and Lake Innes began in November 2019. As of 21 January the Crestwood Drive, Port Macquarie fire had burnt out 3572ha, while the connected Lindfield Park rd, Port Macquarie fire had burnt out 859ha.
The Lake Innes Nature Reserve was home to a flourishing koala colony. Between 350 and 600 koalas are believed to have died in the fires around the Lake Innes area. The image on the left is a screenshot of the RFS Fires Near Me app showing the location and extent of the Port Macquarie fires. The screenshot on the right shows the size of the Port Macquarie fires in relation to other fires in the mid-North Coast region.
Photos below show the aftermath of the fire - taken on 17 January, 2020.
The post below from NSW National Parks and Wildlife Services indicate that while the fire around Lake Innes was extinguished, there remains risk for future fires flaring even several months later. The post below was posted on January 21.
Port Macquarie Koala Hospital
Following the fire a number of injured koalas required intensive care. The Port Macquarie Koala Hospital was inundated 
The Port Macquarie Koala Hospital has a large number of koalas in care. The least injured/ill koalas are available for public viewing, while those most injured are screened from public viewing for their own wellbeing. Below is an example of the management of koalas, their injury/illness and treatment.
Go Fund Me Campaign
Port Macquarie Koala Hospital set up a Go Fund Me Page to raise much needed funds to support care for injured koalas and to establish drinking stations and a breeding program for koalas in the region. The initial goal was for $25,000. By 21 January, the campaign had raised nearly $7.5 million dollars. The scope of the projects originally proposed have now been expanded in light of the huge amount of money raised. Port Macquarie Koala Hospital - Go Fund Me.
A bushfire started on December 31 at Charmhaven on the Central Coast and burned over several days. This is one of the smaller fires in The Australian Bushfires 2019-2020, but still burnt out 418ha of land. Local residents were issued with warnings and in some cases were evacuated. Two homes, located on Birdwood Drive and Arizona Drive were lost.
The photos below show the aftermath of the fire, taken on 18 January. There is some evidence of regrowth, but the fire-ground still smelt of smoke and was still hot underfoot.
Community groups have attempted to rescue injured wildlife and provide food for them. Below are photos of food left in a hanging container and food left on a tree stump.
Coordination of feeding and watering stations has been aided by the using of spatial technologies such as Google maps.
A Water Our Wildlife CCWSAR Map has been developed to help volunteers know where feeding and watering stations have been set up, so that people can visit them independently and re-stock them.. 
This is part of a unit of work for Changing Places - Australia's Urban Future. Lesson 1: Australia's Projected Population Growth Lesson 2: Implications for Future Growth and Sustainability Lesson 3: Sydenham to Bankstown Urban Renewal Precinct Lesson 4: WestConnex - Sydney, Sustainability and Transport Lesson 4: Sydney Sustainability and Transport (Teacher's Notes) Lesson 5: The GreenWay Lesson 5: Deindustrialisation Lesson 6: Create an infographic Lesson 7: Contributing to a Sustainable Urban Future Lesson 7: WestConnex - Protest Movements and Impacts Lesson 7: Conflict Over Dulwich Hill OR See the complete unit on the Changing Places website. Sydney’s Inner West is still experiencing deindustrialization as industrial land users continue to move further west. Zoning for high density residential developments has exacerbated the increase in land values of industrial properties in Inner West suburbs. As a result some of the last remnants of the suburbs’ blue collar, industrial working class history are being redeveloped. Old waterfront industrial sites such as Rozelle Bay and White Bay have already been rezoned as part of the Bays Precinct urban renewal initiative. Recent rezoning for high density residential housing in suburbs such as Marrickville and Dulwich Hill will see a decline in small industries in coming years.
Fieldwork: Visit Marrickville, and take photographs that show evidence of change occurring. Examine the main street, Marrickville rd. Conduct an environmental survey on the main street. Conduct a landuse survey of Marrickville. Use an outline map of the suburb, and shade in different colours to represent different landuses (yellow – low density residential, brown – high density residential, red – commercial, grey - industrial, blue – public facilities/institutions, green – recreation). Compare your landuse survey to the proposed plans for Marrickville and describe the landuse changes that will take place. Lesson Activity: Deindustrialisation Choose one suburb that will be changed by the Planned Precincts. Create a digital map that shows the existing density of the suburb, and another map which shows the proposed density of the suburb. Use Google Maps to help you create your map. Use flowcharts and mind maps to visually represent the changes that are occurring in Sydney’s Inner West. You may choose to group your ideas around specific suburbs or developments. 
This is part of a unit of work for Changing Places - Australia's Urban Future. Lesson 1: Australia's Projected Population Growth Lesson 2: Implications for Future Growth and Sustainability Lesson 3: Sydenham to Bankstown Urban Renewal Precinct Lesson 4: WestConnex - Sydney, Sustainability and Transport Lesson 4: Sydney Sustainability and Transport (Teacher's Notes) Lesson 5: The GreenWay Lesson 5: Deindustrialisation Lesson 6: Create an infographic Lesson 7: Contributing to a Sustainable Urban Future Lesson 7: WestConnex - Protest Movements and Impacts Lesson 7: Conflict Over Dulwich Hill OR See the complete unit on the Changing Places website. Community groups lobbied for the continuation of a Greenway Trail along the light rail corridor to link up with the Cooks River cycleway. The Cooks River to Iron Cove GreenWay is a green corridor following the route of the Rozelle to Dulwich Hill light rail line. It is shared pedestrian and cyleway that links the Cooks River Cycleway and the Iron Cove BayRun. The combination of both light rail and the Greenway encourages public transport use and cycling/walking both for recreation and commuting, reducing some of the car dependence in this part of Sydney. In addition to providing opportunities for residents to choose cycling and walking as an alternative to car travel, it also provides a habitat corridor, linking several bushcare sites in the Inner West.  Fieldwork: Visit a site along the GreenWay. Walk along the greenway and choose 3 separate locations to complete an environmental survey. Compare the results of the 3 surveys. Explain how the Greenway contributes to the sustainability of the Inner West.
This is part of a unit of work for Changing Places - Australia's Urban Future. Lesson 1: Australia's Projected Population Growth Lesson 2: Implications for Future Growth and Sustainability Lesson 3: Sydenham to Bankstown Urban Renewal Precinct Lesson 4: WestConnex - Sydney, Sustainability and Transport Lesson 4: Sydney Sustainability and Transport (Teacher's Notes) Lesson 5: The GreenWay Lesson 5: Deindustrialisation Lesson 6: Create an infographic Lesson 7: Contributing to a Sustainable Urban Future Lesson 7: WestConnex - Protest Movements and Impacts Lesson 7: Conflict Over Dulwich Hill OR See the complete unit on the Changing Places website. Social Movements Social movements can provide residents of a community with a means of influencing their local environment. They provide a way for residents to communicate opinions on planning and other matters to the formal planning structures and organisations, and to intervene in the formal political system. Activities of social movements can include letter-writing campaigns, protest meetings, and media campaigns. Social movements can be important agents of urban change and can empower local communities. An example of a social movement is the urban cycling movement which aims to reduce car dependence and improve sustainability of transport, increase safety on roads for cyclists and encourage a collective increase in personal health and wellbeing through exercise.  Resident Action Groups Resident Action Groups are a form of social movement at a smaller scale, and usually involve issues of a short term nature. RAGs often tend to be localized and single-focused. Although these groups are usually designed to force significant changes in society as a whole, they can at times bring about change at a smaller scale. Unlike social movements more generally, RAGs are more obviously limited and can be interpreted as having NIMBY (not in my backyard) motives. Recent transport infrastructure development and proposals for high density throughout the Inner West of Sydney have created an increase in the number of RAGs and concentrated the patterns of RAGs around development sites. There are currently a large number of Resident Action Groups in the Inner West of Sydney protesting and lobbying against WestConnex and increased development. Examples include Rozelle Against WestConnex, Save Dully, and Newtown WestConnex Action Group. Rozelle Against WestConnex The Rozelle Against WestConnex group lobbies against WestConnex in general, but more specifically the Rozelle Interchange in the vicinity of the Rozelle Goods Yard, as well as the tunnels running below Denison and Darling Streets. This will involve acquisition and demolition of homes and businesses and creation of 12-metre high, unfiltered smoke stacks. Save Dully The Save Dulwich Hill Community Group promotes issues related to the redevelopment of the suburbs and lobbies the government to preserve the heritage of suburb. Visit the Save Dully website to read more about their actions. Dulwich Hill experienced growth in the late 1800s following the introduction of the tram line, and as a result contains buildings with heritage architecture, particularly Federation architecture. The Sydenham to Bankstown Urban Renewal Strategy, encompasses the suburb of Dulwich Hill, rezoning for higher density and redevelopment of older buildings. Save Dully is lobbying to ensure that the historic and diverse nature of Dulwich Hill is preserved. Newtown WestConnex Action Group The M4-M5 link tunnels will run underneath Newtown. Many Newtown business owners have begun protesting the development, worried that congestion and bottlenecks will negatively impact retail businesses, or alternatively that clearways along King St will kill business. The Newtown WestConnex Action Group has been formed. In Alexandria a new bridge is being constructed over the canal to allow movement of traffic from the St Peters interchange. Lesson Idea: Individual and community action Examine the ways that individuals and communities have contributed to the political process and discussions about the WestConnex project. Write a paragraph about 5 actions taken by individuals and communities. Do you think these have been effective? Do you think these actions are justified? What other actions could individuals or communities take? Examine a video of a council meeting about West Connex (try a simple search on Youtube). Consider how the different groups and individuals perceive how WestConnex impacts their community and/or environment. Choose a persona from one of the following: local resident, local councilor, construction worker, urban planner. Write a series of tweets that you might compose to tell your feelings and opinions about the issue. Take photographs of a site that will be or has been affected by WestConnex. You may use Google Street View if you are not close by to a relevant site. Annotate the photographs showing how features of the environment have changed or will change as a result of the WestConnex development. Assess how the changes to the site will impact on its environmental quality. Obtain aerial photographs of the Inner West of Sydney (these may be screen shots from Google Maps). Visually represent the changes that are taking place in the area. Annotate the aerial photographs showing locations affected by Planned Precincts, WestConnex and the Metroline. Include detail about the types of changes that are going to take place. Fieldwork: Questionnaire
Conduct a questionnaire on residents that live in the Inner West of Sydney. Design 8-10 questions to ask. Some examples:
There is a huge amount of information available about coral reef health and in particular the mass coral bleaching events that have occurred over the past two years. Two of my previous posts are linked below, but if you scroll to the bottom of the page there are a range of other articles, reports and websites regarding coral bleaching that you might find useful.
Previous posts: Mass coral bleaching events Coral bleaching - reef resilience Students should define the following key terms: - acclimatise - connectivity - recruit - adaptation - natural selection - symbiotic - zoozanthallae - parasite - photosynthesis Answer the questions below. Conduct internet research to find articles and reports which support your answers.
Resources: Coral bleaching - GBRMPA Coral bleaching and the Great Barrier Reef - ARC CoE Coral bleaching: Extreme heat pushes parts of the Great Barrier Reef beyond recovery - ABC Coral bleaching events - AIMS Great Barrier Reef: a "hopping hotspot" - Australian Geographic
The changes in temperature and associated bleaching are resulting in a different mix of species on the reef. This will impact reefs in the long term. Loss of species Fish, whales, dolphins, sharks, rays and the many other organisms found in reefs rely on the complexity of the ecosystem for survival. Some fish rely on the colour of the corals for camoflauge and the structure of the coral for hiding. Many organisms are unable to carry out normal functions and processes as a result of the increased ocean acidification associated with climate change. Shellfish are less able to create their shells due to increased pH. Slow growing corals will take 100-200 years to recover, meaning that the reef will not exist in the form that we have known it in the past. Dispersal of spawn Ocean warming impacts on the dispersal or coral spawn (eggs). Increased ocean temperatures result in a decline in the dispersal distance of coral spawn from the origin (parent coral) to the destination site. This change in dispersal patterns can impact on species' distribution, abundance or corals in particular areas and genetic diversity across reefs. Changes to dispersal patterns can also impact on the connectivity (interconnections) between different areas of the reef by limiting the areas of reef that particular coral species are located. Poleward shift of species Ocean warming can also result in a poleward shift of species from tropical zones to more temperate zones. Warmer waters are found further from the tropics and species are able to take advantage by increasing their range. In Western Australia, a species of wrasse - cheorodon rebuscens has started to shift its range with displacement of recruits south of its usual habitat. There is evidence of high recruitment at the temperate edge and no recruitment at the tropical edge. The range shift provides limited expansion opportunities, reducing resilience of the species. Irukandji are migrating further south on the Great Barrier Reef as a result of warmer waters and are also having longer seasons in other areas. There have been anecdotal reports of increases in reports of stinging and hospitalisations on islands within the Great Barrier Reef (e.g Fitzroy Island) and snorkellers are being strongly advised to wear stinger suits outside of usual peak Irukandji seasons. Irukandji and associated stingings have also been reported on western side of the southern tip of Frazer Island where they haven't previously been found. Symbiotic relationships Following bleaching events or even natural disasters, corals can become overgrown with algae, making it difficult for coral recruits to settle and grow. The mix species on a reef can impact on how resilient that particular reefs is. For example in Moorea in French Polynesia experienced high coral mortality in the 1980s. Recovery of the reef was enabled in part as a result of grazing fish such as parrot fish removing some of the algae in the process of eating corals. In this way the biodiversity of the reef contributed to high levels of resilience on the reef in comparison to some other reefs globally. The scale of the bleaching on GBR make it unlikely that these types of natural processes will have much of an impact on recovery. Below: A parrot fish on the outer reef, 2015.   I had the pleasure of hearing Professor Terry Hughes present as part of the Sydney Ideas talks being run by the University of Sydney. Professor Hughes is Centre Director at the ARC Centre for Excellence for Coral Reef Studies at James Cook University. I use the term "pleasure" because I am a big fan of his work, and think that some of the visual representations that he has created have been incredibly powerful in explaining coral bleaching to students, but actually the information presented was really quite depressing. Image left: Photograph of bleached corals at Fitzroy Island April 2017. Hughes described some of the main drivers of degradation of coral reefs: pollution, overfishing and climate change. He explained how overfishing had resulted in the reduction of stock sizes for different species in the past century, how pollution from inland activities resulted in coral mortalities and encroachment of different ecosystems like mudflats in areas previously thriving with corals. He went on to say that the scale and extent of these changes were being dwarfed by the immediate and irreparable changes being wrought by back to back bleaching events. Below right: Bleached coral on Fitzroy Island April 2017.
Mass bleaching events have occurred in both 2016 and 2017 as a result of increased ocean temperatures. The bleaching is as a result of corals expelling their symbiotic algae. Coral bleaching tends to occur after the summer temperature maximum, and relates to where the hottest water is. In 2016 coral bleaching severely bleached the northern third of the Great Barrier Reef, the middle section was bleached to a lesser extent, but still quite severely, while the bottom third of the reef largely escaped bleaching in 2016. This was established by the surveying of 1160 reefs through 9000km of aerial surveys, and 75 hours of flying. The 2017 bleaching event impacted the central section of the GBR, while the bottom third is again largely unbleached. Cycle Debbie, a chance weather event, lowered temperatures in the southern part of the reef, which contributed to reducing bleaching in this section. The combination of both the 2016 and 2017 bleaching events has been extremely damaging. There have been reports that the recent cyclone that affected Queensland, Cyclone Debbie may play a role in reducing the impact of coral bleaching. It was reported in the Cairns Post that the cyclone would reduce ocean temperatures, bring cooler waters to the surface and increase cloud cover, thus reducing bleaching, providing stressed corals with an opportunity to recover. The Cairns Post reported that temperatures off Lizard Island had dropped by three degrees and that this would reduce the severity of bleaching. It also provided quotes from a free diver describing the amazing colours and marine life of the outer reef. In reality, as already stated Lizard Island and the top third of the Great Barrier Reef were already severely affected by bleaching in 2016 (well before Cyclone Debbie) and were again affected in 2017. In any case, the path of the cyclone was too far south to have any real impact on areas severely affected by bleaching. Will the Great Barrier Reef recover? There is a narrow opportunity for limited recovery, but the Great Barrier Reef as we know it (complexity, extent, etc) is already dead in many areas. It will continue to exist but with reduced biodiversity. Any real opportunities to protect the reef as it remains is reliant on halting temperature increases and stabilising the climate through reducing reliance on fossil fuels. With negotiations underway between the Australian Government and Adani for for the creation of the Marmichael mines this seems highly unlikely. For more detail on coral bleaching see my article in this term's GTA NSW HSC edition of the Bulletin. http://www.gtansw.org.au |
Louise SwansonDeputy Principal at a Sydney high school. Coordinating author of the Geoactive text book series. Archives
May 2023
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