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February 25, 2021 by Kurt Buzard

Desert Adaptations in Mohave C3 Plants

Bristly Fiddleneck (Amsinckia tessellata). Las Vegas Wash, Nevada

Bristly Fiddleneck (Amsinckia tessellata). Las Vegas Wash, Nevada

Desert plants tend to look very different from plants native to other regions. They are often swollen, spiny, and have tiny leaves that are rarely bright green. A desert always has a limitation of water but the temperature may be hot or cold, high altitude and cloudy like parts of Costa Rica or low altitude and windy like the Cape Preserve in South Africa. The strange appearance of these plants is a result of their remarkable adaptations to the challenges of the desert climate. Desert plants have developed three main adaptive strategies with diverse implementations often in different species with convergent evolution to the same form: succulence, drought tolerance and drought avoidance in annual plants. Each of these is a different but effective suite of adaptations for prospering under conditions that would kill plants from other regions. These differences often extend to the cellular level with the development of special structures to store water in leaves and stems, the periodic shedding of leaves, and special adaptations to even the basic photosynthesis process. Chlorophyll (the green pigment in plants) is the only known substance in the universe that can capture volatile light energy and convert it into a stable form usable for biological processes (chemical energy) through the Calvin Cycle and the enzyme RuBisCO. Green plants use blue and red light energy to combine low-energy molecules (carbon dioxide and water) into high-energy molecules (carbohydrates or starch), which they accumulate and store as energy reserves. There are at least three variations of photosynthesis, all of which use the same basic mechanism, C3 carbon fixation used by most plants, C4 carbon fixation used in about 3% of plants and the CAM (crassulacean acid metabolism) carbon fixation pathway that evolved in plants like cactus as an adaptation to arid conditions.

[Read more…]

Filed Under: Las Vegas, Plants and Gardens Tagged With: C3 Carbon Fixation, Carbon Fixation, Desert Flowers, Desert Spring Flowers, Drought Deciduous, Flowers, Las Vegas, Mohave Desert, Native Plants, Nevada, Photosynthesis, plants, Wildflowers

December 20, 2020 by Kurt Buzard

Rogers and Blue Point Springs

Rogers Spring Near Overton, Nevada

Rogers Spring Near Overton, Nevada

Sometimes, looking for plants and flowers in winter can be interesting, particularly near a source of fresh water in the desert. In November, I visited Rogers and Blue Point Springs on the north shore of Lake Mead in the Lake Mead National Recreation Area. Rogers Spring and other springs in the “North Shore Complex” comprise one of the terminal discharge areas for the regional carbonate-rock aquifer system of eastern Nevada and western Utah. The source of the water to this spring and other regional carbonate-rock aquifer springs is uncertain. The prevailing theory suggests that much of the recharge water that enters the carbonate-rock aquifer occurs in the high mountain ranges around Ely, Nevada, located 250 miles north of Lake Mead. As this ground water flows south through the carbonate rocks, it encounters several faults along the way, including the Rogers Spring Fault, which has caused the older carbonate rocks (primarily limestone and dolomite) to be displaced against younger evaporite deposits of the Muddy Creek and Horse Spring formations. Here, the lower permeability of these evaporite deposits, along with high subsurface water pressure, forces the ground water in the carbonate rocks to flow upward along the fault and emerge at the surface as Rogers Spring.

[Read more…]

Filed Under: Las Vegas, Plants and Gardens Tagged With: Bees, Birds, Blue Point Spring, Desert Springs, Flowers, Lake Mead National Recreation Area, Las Vegas, Mohave Desert, plants, Rogers Spring, Wildflowers

November 8, 2019 by Kurt Buzard

Interesting Trees in Costa Rica

Pink Shower Tree (Cassia grandis). La Ensenada, Costa Rica

Pink Shower Tree (Cassia grandis). La Ensenada, Costa Rica

I thought I would add a post on the trees of Costa Rica since there are so many beautiful and unusual specimens. This trip, I visited during the winter or dry season, so many of the plants were without leaves or flowers. Nonetheless, there were many fascinating examples of trees that we in North America rarely get to see. I have roughly divided them into fruit trees, large trees and palm and palm-like trees. Cassia grandis, seen above, is one of several species called pink shower tree, and known as carao in Spanish. It is a flowering plant in the family Fabaceae, native to the neotropics, that grows up to 98 feet (30 m). The species is distributed from southern México, to Venezuela and Ecuador. It grows in forests and open fields at lower elevations, and is known to be planted as an ornamental. In at least Costa Rica, its pods are stewed into a molasses-like syrup, taken as a sweetener and for its nutritional and medicinal effects, called Jarabe (or Miel) de Carao.

[Read more…]

Filed Under: Costa Rica, Plants and Gardens Tagged With: Attalea butyracea, Bactris guineensis, Cashew Tree, Cassia grandis, Cecropia Tree, Ceiba pentandra, Costa Rica, Crescentia alata, Cyrtostachys renda, Dracena fragrans, Enterolobium cyclocarpum, Ficus citrifolia, Ficus goldmanii, Guanacaste Tree, Jicaro, Kapok Tree, Lipstick Palm, Mango Tree, Morro Tree, Pachira quinata, Pachote Tree, Phyllanthus acidus, Pink Shower Tree, plants, Psychotria nervosa, Socratea exorrhiza, Strangler Fig, Tabago Cane, Tabernaemontana litoralis, Trees, Vanuatu Fan Palm, West India Gooseberry, Wild Coffee, Yellow Oleander, Yucca gigantea

October 9, 2019 by Kurt Buzard

Plants of the Cloud Forest of the Cordillera de Talamanca

High Mountain Cloud Forest in Costa Rica

High Mountain Cloud Forest in Costa Rica

Most of Costa Rica’s forests can be primarily classified into three groups; rainforests, cloud forests and topical dry forests. And while rainforests are the most common habitat, the cloud forests of Costa Rica are a magnificent sight to behold. Rainforests can be found in the southwest of the country as well as in the Atlantic lowlands, with towering trees and looping vines that create a magical wispy environment. Receiving a high annual rainfall, these dense forests are characterized by a wealth of plant and animal life. Rainforests are located at lower elevations, and as a result, they tend to be much warmer, especially during the dry season. Cloud forests, on the other hand, are usually located at much higher elevations, and are much cooler. This difference in temperature contributes to the mist and fog that is often visible in cloud forests, as the milder temperatures slow the evaporation process. However, despite being a little cooler than rainforests, cloud forests are very humid. Cloud forests generate water by capturing water from fog (surface clouds). Water condenses on the leaves and branches of cloud forest trees, epiphytes and lichen, drips to the forest floor, and enters streams. The tropical evergreen cloud forests on the slopes of the Cordillera de Talamanca in Costa Rica’s southern highlands is of vital importance both as a source of drinking and irrigation water to the main cities in the Valle Central and as a bastion of many endemic species. This is not meant to be a comprehensive survey of the plants in the cloud forest, concentrating instead on important and noteworthy plants in this ecosystem.

[Read more…]

Filed Under: Birds, Costa Rica, Plants and Gardens Tagged With: Androlepis skinneri, Batsu Garden, Bromeliads, Brugmansia sanguinea, Calla Lily, Canna indica, Canna iridiflora, Cloud Forest, Cordillera de Talamanca, Costa Rica, Fuchsia boliviana, Fuchsia paniculata, Gunnera insignis, Gunnera talamancana, Lianas, Lichens, Monstera deliciosa, Mountain Papaya, Noni Fruit, Noni Tree, Oak Trees, Papayuela, Paraiso Quetzal Lodge, Philodendron, photographs, Pictures, plants, Quercus copeyensis, Quercus costaricensis, Resplendent Quetzal, Senna pallida, species, Succulents, Tree Fern, Vines

October 5, 2018 by Kurt Buzard

Bloedel Aviary and Conservatory in Vancouver

Zebra Finch (Taeniopygia guttata)

Zebra Finch (Taeniopygia guttata)

When we visited Vancouver, we came across the most amazing little conservatory. The Bloedel Conservatory is essentially a large bird cage located at the peak of Vancouver in Queen Elizabeth Park. There are 120 exotic mainly tiny birds and over 500 kinds of tropical plants inside the dome. This elaborate cage for the birds and plants reveals something very ancient and primal to humans, the desire to bring the outdoors inside. In this case, these are exotic birds and plants that would not survive in the relatively harsh climate of Vancouver but even in antiquity local birds were kept by the wealthy, in particular for harems and by mariners to find land in the open sea. In medieval Europe, bird keeping was mostly for the wealthy. Kings, Queens and the Clergy would often keep parrots. The Sumerians, the oldest civilization known to have kept written records, had a word, subura, for birdcage. Do we bring birds inside our homes because we are unable to enter theirs? Do we try to tame wild nature because we fear we can never tame our own? These bits of philosophy are thanks to a beautiful essay on caged birds by Jerry Dennis, found below. For the purpose of this post, I thought we would just enjoy these birds, in one of the best settings for an aviary I have yet to see.
[Read more…]

Filed Under: Animals, Aquariums and Zoos, Birds, Canada and Alaska, Plants and Gardens Tagged With: African Grey Parrot, Amazon Lily, Aviary, birdcage, Birds, Bloedel Conservatory, Blue-and-Yellow Macaw, Budgie, Canada, Canary, Cut Throat Finch, Eclectus Parrot, Estrildid Finches, Long Tailed Finch, Nepenthes mirabilis, Owl Finch, Parakeet, plants, Plum Headed Finch, Plumeria, Society Finch, Star Finch, Umbrella White Cockatoo, vancouver, Zebra Finch

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