Skip to content

SANParks.org Forums

View unanswered posts | View active topics






Post new topic Reply to topic  Page 1 of 1
 [ 8 posts ] 
Author Message
 Post subject: Re: Rain in Kruger
Unread postPosted: Tue Apr 13, 2010 5:56 pm 
Offline
Senior Virtual Ranger
Senior Virtual Ranger
User avatar

Joined: Mon Dec 11, 2006 1:45 pm
Posts: 4955
Location: southern gauteng
Image
A few days ago I was a few seconds too late to capture the best of the sunset painted scene when the sun disappeared behind a cloud .

_________________
KNP is sacred. I am opposed to the modernisation of Kruger and from the depths of my soul long for the Kruger of yesteryear! 1000+km on foot in KNP incl 56 wild trails.200+ nights in the wildernessndloti-indigenous name for serval.


Top
 Profile  
 
 Post subject: Re: Rain in Kruger
Unread postPosted: Wed Apr 14, 2010 7:53 am 
Offline
Senior Virtual Ranger
Senior Virtual Ranger
User avatar

Joined: Mon Dec 11, 2006 1:45 pm
Posts: 4955
Location: southern gauteng
Sprocky wrote:
Nice pic Ndloti! :thumbs_up:
One question, that flat green section, is that not water? :hmz:


Orpen dam covered with water lettuce , an exotic invader plant which is being fought biologically - a beetle that feeds solely on the water lettuce has been introduced in an effort to control the infestation .

_________________
KNP is sacred. I am opposed to the modernisation of Kruger and from the depths of my soul long for the Kruger of yesteryear! 1000+km on foot in KNP incl 56 wild trails.200+ nights in the wildernessndloti-indigenous name for serval.


Top
 Profile  
 
 Post subject: Re: Rain in Kruger
Unread postPosted: Wed Apr 14, 2010 10:14 am 
Offline
Senior Virtual Ranger
Senior Virtual Ranger
User avatar

Joined: Mon Dec 11, 2006 1:45 pm
Posts: 4955
Location: southern gauteng
The beetle is a biological control measure introduced by the KNP alien biota control division .
The water lettuce is an alien (introduced from other continents by man through aquatic animals kept in aquariums or fishponds) highly invasive species which does not naturally occur in RSA and has no natural enemies that utilise it for food , which allows it to increase without its growth being controlled naturally .
Water lettuce (there are also many other alien plant and animal species) then covers rivers , dams and pans preventing the sunlight from entering that is necessary for natural plant growth to photosynthesise , thus natural aquatic plant life dies and the chain repeats itself when the fish die and other organisms cease to be viable due to lack of oxygen from the natural plant life , wherupon animals & birds that feed on the fish move away along with their associated predators .

The roan antelope numbers decreased due to the provision of unnatural water points which attracted other antelope which were strongly competitive to the roans more selective feeding needs .

As a matter of interest , the biggest long term threat to the KNP is the potential loss of biodiversity due to invasive species .

Did you know that there is an area around Skukuza which is over 10 000 ha in extent which is so totally infested with prickly pear that very little mammal life exists there ?

_________________
KNP is sacred. I am opposed to the modernisation of Kruger and from the depths of my soul long for the Kruger of yesteryear! 1000+km on foot in KNP incl 56 wild trails.200+ nights in the wildernessndloti-indigenous name for serval.


Top
 Profile  
 
 Post subject: Orpen Dam.
Unread postPosted: Sun May 23, 2010 8:58 am 
Offline
User avatar

Joined: Sun Nov 09, 2008 11:19 am
Posts: 145
Location: KZN South Coast-Just too far from Kruger
This is ORPEN DAM lookout ....

Image

and the dam itself.

Image

This one is of the same dam but was taken in September 2008.

Image

_________________
KRUGER, my happy place!
+++++++++++++++++++++++++++++++++++++++
BIYAMITI - 28th/29th Sept. 2014
LOWER SABIE - 30th Sept.& 1st/2nd Oct.
OLIFANTS - 3rd/4th Oct.
SATARA - 5th/6th Oct.
SKUKUZA - 7th/8th Oct.
BERG EN DAL - 9th Oct.


Top
 Profile  
 
 Post subject: Orpen Dam
Unread postPosted: Fri Oct 29, 2010 10:43 am 
Offline
User avatar

Joined: Wed Oct 01, 2008 12:41 pm
Posts: 51
Location: In a Cornish Smugglers cottage - or KNP
Just curious to know when and how Orpen Dam was emptied of the water hyacinth/cabbage stuff?

All previous visits including the end of August, I have seen it totally green but this week it is just 'pure' (to a hippo) water!

Was it cleared by rangers or did the natural control finally work - if so, it seems amazingly quick!


Top
 Profile  
 
 Post subject: Re: Orpen Dam
Unread postPosted: Fri Oct 29, 2010 11:10 am 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar

Joined: Wed Aug 31, 2005 12:28 am
Posts: 14330
Location: Pretoria, RSA
They are under biological control, as it is impossible to physically remove such plants completely by physical means. Also take in to account that it has been winter which would naturally lessen their numbers.

But I don't think the problem has been solved completely as yet.

_________________
Imberbe = Combretum imberbe = Leadwood = Hardekool = The spirit of the Wildernis!

Want to know more about the SANParks Honorary Rangers? Visit www.sanparkshr.org


One positive deed is worth more than a thousand critical words.


Top
 Profile  
 
 Post subject: Re: Orpen Dam
Unread postPosted: Fri Oct 29, 2010 3:00 pm 
Offline
User avatar

Joined: Wed Oct 01, 2008 12:41 pm
Posts: 51
Location: In a Cornish Smugglers cottage - or KNP
Thanks. The sign has been up for ages talking about the biological control but I was amazed how clear it is now.


Top
 Profile  
 
 Post subject: Re: Orpen Dam
Unread postPosted: Sun Nov 07, 2010 11:25 am 
Offline
User avatar

Joined: Sat Jan 02, 2010 4:36 pm
Posts: 268
Location: London, but from Blaauwberg
I've seen the sign there since my first visit to Orpen Dam in 2006.One major difference to all previous visits was the very obvious hippo pod in attendance. They were definately there in previous years. Might they be the reason for the turnaround. I've heard muted mention of there influence. If they are the major influence it would be interesting to hear whether they made there own way to Orpen Dam or were relocated to there.

Any comments from Sanparks?

_________________
To see a sunrise in KNP is to see magic.

Next trip is in the planning phase........


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 



Who is online

Users browsing this forum: No registered users and 4 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

Webcams Highlights

Addo Nossob Orpen Satara
Addo Nossob Orpen Satara
Submitted by mitzi 14 at 15:44:32 Submitted by mitzi 14 at 15:40:40 Submitted by Kokkewiet at 18:56:16 Submitted by mitzi 14 at 16:42:20