Date: Fri 8 Nov 2019
From: CBS News [edited]
Weak from hunger and thirst, the elephant struggled to reach a pool of water in this African wildlife reserve. But the majestic mammal got stuck in the mud surrounding the sun-baked watering hole, which had dramatically shrunk due to a severe drought. Eventually park staff freed the trapped elephant, but it collapsed and died. Just yards away lay the carcass of a Cape buffalo that had also been pulled from the mud but was attacked by hungry lions.
Elephants, zebras, hippos, impalas, buffaloes and many other wildlife are stressed by lack of food and water in Zimbabwe's Mana Pools National Park, whose very name comes from the 4 pools of water normally filled by the flooding Zambezi River each rainy season, and where wildlife traditionally drink. The word "mana" means 4 in the Shona language. At least 105 elephants have died in Zimbabwe's wildlife reserves, most of them in Mana and the larger Hwange National Park in the past 2 months, according to the Zimbabwe National Parks and Wildlife Management Authority. Many desperate animals are straying from Zimbabwe's parks into nearby communities in search of food and water.
Mana Pools, a UNESCO World Heritage Site for its splendid setting along the Zambezi River, annually experiences hot, dry weather at this time of year. But this year  it's far worse as a result of poor rains last year . Even the river's flow has reduced.
The drought parching southern Africa is also affecting people. An estimated 11 million people are threatened with hunger in 9 countries in the region, according to the World Food Program, which is planning large-scale food distribution. The countries of southern Africa have experienced normal rainfall in only one of the past 5 growing seasons, it said.
Seasonal rains are expected soon, but parks officials and wildlife lovers, fearing that too many animals will die before then, are bringing in food to help the distressed animals. The extremely harsh conditions persuaded park authorities to abandon their usual policy of not intervening. Each morning, Munyaradzi Dzoro, a parks agency wildlife officer, prays for rain. "It's beginning to be serious," he said, standing next to the remains of the elephant and buffalo. "It might be worse if we fail to receive rains" by early November . The last substantial rains came in April, he said.
An early end to a "very poor rainy season" has resulted in insufficient natural vegetation to see the animals through, said Mel Hood, who is participating in the Feed Mana project, which is providing supplementary feeding. Most of the animals in Mana Pools "are more or less confined to the barren flood plains," where temperatures soar to 113 deg F (45 deg C), she said.
Separated from neighboring Zambia by the Zambezi, the region's once reliable sources of water have turned into death traps for animals desperate to reach the muddy ponds. Like the elephant and buffalo, many other animals in the park have gotten stuck in the clay while trying to reach Long Pool, the largest of the watering holes at 3 miles (5 km) long.
The animals were pulled out by rangers, but they could not survive predators on the pounce for weak prey. "The carnivores attacked it from behind," Dzoro said of the buffalo. The elephant carcass had been there for almost a week and emitted a strong stench as flies feasted on it.
At just 5% of its normal size, Long Pool is one of the few remaining water sources across the park's plains. On a recent day, hippos were submerged in some puddles to try to keep their skin from drying out in the extreme heat while birds picked at catfish stranded in the mud.
Two others of Mana's pools have completely dried up, while the 3rd is just 20% to 30% of its usual size and dwindling, Dzoro said.
There are more than 12 000 elephants roaming Mana's flood plains, as well as an abundance of lions, buffaloes, zebras, wild dogs, hyenas, zebras and elands. The animals are visibly affected by the drought. Some impalas show signs of skin mange. In addition to the land animals, the park has 350 bird and aquatic species, according to the parks agency.
In other parts of Mana, park authorities are pumping water from deep boreholes, but the supplies are barely enough, he said. "We used to say nature should take its course," Dzoro said of the park's normal policy of not intervening and allowing the ecosystem to find its own balance. "We are now forced to intervene, which is manipulative conservation, because we are not sure when and how we will receive the rain. To avoid losing animals we have to intervene to maintain population sizes," Dzoro said.
With the acacias, other indigenous trees and grasses that provide the bulk of food for herbivores like elephants and buffaloes also decimated by the drought, authorities began supplementary feeding in July .
Trucks and tractors ferry hay to various locations in the 2196-square km (848-square mi) park. In some spots, elephants, buffaloes and zebras are fed next to each other. The Feed Mana project has so far trucked 14 000 bales to the park, said Hood, the animal welfare campaigner. The group has been appealing for "urgent" donations of items such as soy bean hay, grass and cubes made of nutritious grains and molasses. "Although it may not be enough to stave off all the hunger pangs, it is certainly giving these animals a chance to survive until conditions improve," Hood said.
Zimbabwe has an estimated 85,000 elephants and neighbouring Botswana has more than 130,000. The 2 countries have the largest elephant population in the world. Zimbabwe says it's struggling to cope with booming numbers of wild elephants and is pushing to be allowed to sell its ivory stockpile and export live elephants to raise money for conservation and ease congestion in the drought-affected parks.
Other African countries, especially Kenya, are opposed to any sale of ivory. And earlier this year  the meeting of the Convention on International Trade in Endangered Species voted to continue the ban on all ivory sales.
At Mana Pools, saving the animals is a challenge, and officials say Zimbabwe is severely affected by climate change that has changed weather patterns. In past years, Mana Pools would get up to 24 inches (600 mm) of rain per year, said Dzoro, the wildlife officer. Now it's lucky to get half that. With such a dramatic reduction, "we can't have perennial sources to sustain animals and some of the perennial springs have dried up. Climate change is affecting us. That's why the manipulative way now is the only way to rescue our fauna," Dzoro said. "Climate change is real for sure, we are witnessing it," he said.
ProMED-mail Rapporteur Joseph P. Dudley, PhD
Research Scientist II
Institute of Arctic Biology - University of Alaska Fairbanks
[Previous severe droughts associated with significant levels of elephant mortality also occurred in this region during the early 1980s and mid-1990s (1980-1984, 1993-1995). As much as 10% or more of the total population of Hwange National Park may have died during the 1993-1995 drought (1).
It appears that there has been a delay in the onset of the rainy season onset this year (2019). Rainfall data from Hwange National Park in western Zimbabwe, one of the areas mentioned in this article, show that the onset of the rainy season in Zimbabwe usually occurs in October, peaks during December and January, and tapers off during March and April (based on 80-year dataset spanning the period from 1918 to 1998).
Temperature data from Hwange National Park for the period from 1951 through 1994 indicate a progressive warming trend with an increase in the mean monthly maximum temperature of approximately 1.5 deg C in the park for the period between 1950 and 2000.
Satellite monitoring data for precipitation during the past 90 days support drought references in the CBS article. Precipitation anomaly maps indicate rainfalls have been on order of 25% to 50% below the historical average. And mature trees -- especially baobab and mopane -- will likely be getting really hammered this year (2019) from debarking and ring-barking by elephants.
1. Dudley JP, Craig GC, Gibson DStC, et al. Drought mortality of African bush elephants in Hwange National Park, Zimbabwe. Afr J Ecol 2001;39:187-94. - JP Dudley]
[Our thanks to Joe [JP Dudley] for his informed rapporteur's information and comments. While we concentrate on infectious disease, we must not forget that nature can effective cull populations on its own. This drought is affecting the whole of southern Africa, so we can fully parallel die-offs elsewhere. - ProMED Mod.MHJ]