A Walk to the Vogelgat Waterfall

This gallery contains 22 photos.

Originally posted on roncorylus:
There were 11 enthusiastic Hurriers in Vogelgat with perfect hiking conditions to look for the Disa uniflora and to reach the waterfall for a swim. The first Disa was found relatively early during the hike and…

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Fynbos Fires and their Consequences for Birds

Hermanus Bird Club

Positive benefits of fynbos fires are short-term food opportunities for some species

Raptors are often attracted to fire and its charred results, moving in from adjacent habitats. This is particularly evident where predatory birds may flush out injured birds and animals or find other carrion. Jackal Buzzards, Steppe Buzzards and Spotted Eagle Owls are known to visit burnt areas immediately after smoke dissipates. After a relatively short time they move on.

Other species which may take advantage of the aftermath of fynbos fires

The Fork Tailed Drongo, Fiscal Flycatcher, Fiscal Shrike and Cape Grassbird are known to take up the debris of insects, arthropods and the seeds of various plants such as P. falcifolia and L. eucalyptifolium which are exposed about 2 weeks post fire.

Genetic Diversity 

Nectivores such as the Cape Sugarbird, Orange Breasted Sunbird and Cape Bulbul will immediately move away to neighbouring areas, however, this may be…

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Mossel River path renewal

If you go down to the Mossel today you are in for a big surprise.

Everyone should gather there because…

Todays the day you can once more walk along the path next to the river from the sea to the Three Dams. Frank Woodvine and his Malawian men together with some enthusiastic HBS members have hacked and pulled,  slogged and cleared. On Wednesday 23 January 18 excited botanical walkers investigated what had been done.

Starting west of the river mouth, head north until you cross the river to resume walking north, now on the river east bank. A shady section of indigenous trees still shows signs of invading trees, mostly garden escapees from local houses. These will be removed. Just before you reach the bridge across the R 43 near the Voelklip circle, dense bush and rushing river made the path impassable.

But no more! You can now walk to and under the bridge and continue to the arboretum of fascinating cork oak and penny gum trees to name a few and further to the dams.  Enjoy, the walk is charming!

There will be a tree book out soon listing all trees you will see on this walk and indeed in the whole of Hermanus.

Di Marais

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Piet’s AMOEBA Walk

This gallery contains 11 photos.

Originally posted on roncorylus:
This morning Piet promised us an interesting walk – described by him as “The Amoeba”  It was 5.4 km in length and it was most enjoyable, taking 15 Hurriers through a section of the burn and…

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Important Art Exhibition in Hermanus

Margaret de Villiers’ beautiful botanical art is currently on show at the FynArts Gallery in Hermanus.  This is a unique opportunity for the public to see and enjoy this wonderful work by one of our best local artists and winner of countless awards, both local and international.  Not only that, but these originals and art prints are available for purchase at reduced prices, so make the most of this chance to acquire some collectors’ pieces.

The pictures below show some of the display, as well as some close-ups of the actual paintings, demonstrating the incredible attention to detail that characterises Mags’ work.

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In Honour of Frank Woodvine at the Bosman Vineyards – What a surprise!

Today was a botanical walk with a difference and what a special occasion it was for the Hermanus Botanical Society to attend a function in honour of Frank Woodvine, organised and catered for by the Bosman Family Vineyards.

Frank has been instrumental for his tireless work and devotion to re-establishing nature and wetland trails on the Bosman Farm. Although Frank has only known the Bosman family for about three years, his knowledge of the fynbos is highly regarded and there is huge admiration for his work in constructing all their hiking trails, removal of invasive alien vegetation and his dedication to the conservation of the biodiversity and sustainability of the environment in and around Hermanus. We all know of the work he has done for the Hermanus Botanical Society and Fernkloof Nature Reserve over the years and at the Bouchard Finlayson Farm. Frank is such a modest gentleman which is so endearing, not to mention his great sense of humour. He was heard to remark that he had never seen such a good turnout for a Botanical Society walk in all the years, 40 strong.

We all had a really fun time, with the tastiest of wines and delightful platters, which the Bosman Vineyards supplied and served in such style.

Gerhard Bruwer, the farm manager and his wife Karen were perfect hosts. Gerhard delivered a touching speech lauding all that Frank (fondly, Uncle Frank to them) has done for the farm. There is a special plaque erected near the Frame House at the start of the trails to honour what Frank has contributed as a “passionate botanist and conservationist”. Frank replied in his usual proficient style appearing somewhat embarrassed at all the fuss on his behalf. We all know though he thoroughly deserved every bit of the fuss.

There have been some exciting botanical discoveries on De Bos, Paranomus bolusii, Erica peziza, Amphithalea tomentosa, Serruria phylicoides, Muraltia stokoei to name a few.

De Bos will provide platters and coffee with their wine tasting, beautiful picnic baskets on order and live music on Thursday afternoon/evening. To hike you only need to check in at the tasting room. There is a quaint jungle-jim for children. https://bosmanwines.com/

“TO YOU FRANK” CHEERS!

Derek Silberblatt

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Red Tides – the beautiful danger

Yessotoxin formula

Our recent Friday talk in the Fernkloof Hall took us off the hills and into our coastal waters.

Dr Nuette Gordon, a marine biologist with Abagold, set the scene by emphasizing the influence the two major currents, the warm Agulhas and the cold Benguela have on our coastal ecosystem. We are familiar with the large brown kelps and the smaller red and green seaweeds but less aware of the other primary producers, the microalgae or phytoplankton.  Their basic requirements, as with all plant life, are temperature, light and nutrients. Their density and diversity within the water column are sensitive indicators of varying ecological conditions.

A “red tide” is named for the discolouration of the water due to particular microalgae which have distinctive photosynthetic pigments. Some of these produce toxins. As the water is not always red and has nothing to do with tides, the preferred term to use is Harmful Algal Bloom (HAB).  Algal blooms are seasonal. If various factors such as warm currents and increased nutrients combine a HAB can occur within days. Walker Bay is particularly vulnerable in this regard, being in the mixing area of the Agulhas and Benguela currents.

A variety of planktonic diatoms and dinoflagellates can be involved and the toxins themselves vary in their effect on organisms and people.  The impact of HABs on an ecosystem is however more far reaching. An extended foodchain may feel the effect of the toxins and many other organisms will suffer from the depletion of oxygen in the water due to bacterial decomposition.

The economic impacts on such industries as fishing, tourism and aquaculture are well known.  The 2017 HAB had a very serious impact on the abalone industry with a stock loss of 30% and a reduction in growth of 35% from June to December 2017. This has led to intensive examination of all husbandry and monitoring systems at Abagold. Within the research and development of new technologies are programmes leading to early warning of sea conditions and algal blooms.  The National Oceans and Coastal Information Management System (OCIMS) and the CSIR are working closely with Abagold Hermanus.

Red Tides are a natural occurrence.  However, the maintenance of natural filters (wetlands and estuaries), the reduction of fertiliser run-off, and even coastal planning (waste-water discharge, etc) are all to some extent, within our control. With climate change, incidences of HABs are likely to increase and consequently global effort is required to mitigate against the effects of increased carbon dioxide and greenhouse emissions.

Deirdre Richards

 

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