This document provides information about subtropical deserts. It begins with an introduction that defines subtropical deserts and their location between 15-30 degrees north and south latitude. It then covers the physical characteristics of subtropical deserts, including their warm temperatures and low precipitation. The document discusses adaptations of plants and animals to the harsh desert environment, including adaptations like waxy coatings and nocturnal behavior. It provides examples of worldwide locations of subtropical deserts and describes the plant and animal life commonly found in these deserts, including cacti, foxes and kangaroo rats. It concludes with an overview of the food web in subtropical desert ecosystems.
desert ecosystem
Deserts and semi arid lands are extremely specialised and sensitive ecosystems that are easily destroyed by human activities. The plants and animals that inhabit these dry areas can live only in this ecosystem.
Desert ecosystem, is usually believed to be barren, but this fragile ecosystem supports numerous amazing living creatures, known for their adaptability.
Deserts alone covers about seventh of the land surface. We normally call deserts as “sand seas or oceans of sands”. Most of the major desert areas like as the Sahara, the Arabian, the Kalahari, and the Deserts of Australia all lie between 10 and 30 degrees north or south of the equator. Deserts are dry ecosystems comprising a substantial part of the globe
desert ecosystem
Deserts and semi arid lands are extremely specialised and sensitive ecosystems that are easily destroyed by human activities. The plants and animals that inhabit these dry areas can live only in this ecosystem.
Desert ecosystem, is usually believed to be barren, but this fragile ecosystem supports numerous amazing living creatures, known for their adaptability.
Deserts alone covers about seventh of the land surface. We normally call deserts as “sand seas or oceans of sands”. Most of the major desert areas like as the Sahara, the Arabian, the Kalahari, and the Deserts of Australia all lie between 10 and 30 degrees north or south of the equator. Deserts are dry ecosystems comprising a substantial part of the globe
Temperate forests and tropical rain forestsAlen Shaji
The word forest is derived from Latin ‘Foris’ meaning outside, the reference being to village boundary fence, and must have included all uncultivated and uninhabitated land.
Today a forest is any land managed for the diverse purposes of forestry whether covered with trees, shrubs, climbers, etc.
The forest biomes include a complex assemblage of different kinds of biotic communities.
Optimum conditions of temperature and ground moisture responsible for the growth of trees contribute greatly to the establishment of forest communities.
In addition, 50 mm rainfall is a pre-requisite for the trees.
The nature of soil, wind and air currents determines the distribution (abundance or sparseness) of forest vegetation.
The temperate forest biomes are characterized by a moderate climate and broad-leaved deciduous trees, which shed their
leaves in fall, are bare over winter and grow new foliage in the spring.
Basic functional unit of ecology
Interacting system
Fundamental ecological Unit (ODUM)
Biotic and Abiotic factors
A.G.Tansley (1935)
Eco – environment and system – complex coordinated unit
Holocoenosis
Major Biomes of the world.
The aquatic and land biomes including marine, freshwater, forest, desert, savanna, grassland, tundra biomes etc. This include all the details of the actual biome location along with the pictures describing it completely.
Deserts are landforms of sand and sediments. They are the cradles of centrifugal eolian forces. Among all the terrestrial ecosystems, deserts are typical landforms due to their unique ecological conditions.
Desert and near-desert areas cover nearly one-third of the land surface of the globe . Deserts alone covers about one-seventh of the land surface.
This presentation is all about the Terrestrial Biome..made for Environmental Science Students.This came from different authors which I browsed from the net..Hope this will help=)
Temperate forests and tropical rain forestsAlen Shaji
The word forest is derived from Latin ‘Foris’ meaning outside, the reference being to village boundary fence, and must have included all uncultivated and uninhabitated land.
Today a forest is any land managed for the diverse purposes of forestry whether covered with trees, shrubs, climbers, etc.
The forest biomes include a complex assemblage of different kinds of biotic communities.
Optimum conditions of temperature and ground moisture responsible for the growth of trees contribute greatly to the establishment of forest communities.
In addition, 50 mm rainfall is a pre-requisite for the trees.
The nature of soil, wind and air currents determines the distribution (abundance or sparseness) of forest vegetation.
The temperate forest biomes are characterized by a moderate climate and broad-leaved deciduous trees, which shed their
leaves in fall, are bare over winter and grow new foliage in the spring.
Basic functional unit of ecology
Interacting system
Fundamental ecological Unit (ODUM)
Biotic and Abiotic factors
A.G.Tansley (1935)
Eco – environment and system – complex coordinated unit
Holocoenosis
Major Biomes of the world.
The aquatic and land biomes including marine, freshwater, forest, desert, savanna, grassland, tundra biomes etc. This include all the details of the actual biome location along with the pictures describing it completely.
Deserts are landforms of sand and sediments. They are the cradles of centrifugal eolian forces. Among all the terrestrial ecosystems, deserts are typical landforms due to their unique ecological conditions.
Desert and near-desert areas cover nearly one-third of the land surface of the globe . Deserts alone covers about one-seventh of the land surface.
This presentation is all about the Terrestrial Biome..made for Environmental Science Students.This came from different authors which I browsed from the net..Hope this will help=)
A distinct ecological community of plants and animals, living together in a particular climate, is called as a "biome." There are 9 kinds of Biomes are present in the world. This module explains the Tundra(Arctic and Alpine) Biome.
Diabetes is a rapidly and serious health problem in Pakistan. This chronic condition is associated with serious long-term complications, including higher risk of heart disease and stroke. Aggressive treatment of hypertension and hyperlipideamia can result in a substantial reduction in cardiovascular events in patients with diabetes 1. Consequently pharmacist-led diabetes cardiovascular risk (DCVR) clinics have been established in both primary and secondary care sites in NHS Lothian during the past five years. An audit of the pharmaceutical care delivery at the clinics was conducted in order to evaluate practice and to standardize the pharmacists’ documentation of outcomes. Pharmaceutical care issues (PCI) and patient details were collected both prospectively and retrospectively from three DCVR clinics. The PCI`s were categorized according to a triangularised system consisting of multiple categories. These were ‘checks’, ‘changes’ (‘change in drug therapy process’ and ‘change in drug therapy’), ‘drug therapy problems’ and ‘quality assurance descriptors’ (‘timer perspective’ and ‘degree of change’). A verified medication assessment tool (MAT) for patients with chronic cardiovascular disease was applied to the patients from one of the clinics. The tool was used to quantify PCI`s and pharmacist actions that were centered on implementing or enforcing clinical guideline standards. A database was developed to be used as an assessment tool and to standardize the documentation of achievement of outcomes. Feedback on the audit of the pharmaceutical care delivery and the database was received from the DCVR clinic pharmacist at a focus group meeting.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
UNDERSTANDING WHAT GREEN WASHING IS!.pdfJulietMogola
Many companies today use green washing to lure the public into thinking they are conserving the environment but in real sense they are doing more harm. There have been such several cases from very big companies here in Kenya and also globally. This ranges from various sectors from manufacturing and goes to consumer products. Educating people on greenwashing will enable people to make better choices based on their analysis and not on what they see on marketing sites.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
Micro RNA genes and their likely influence in rice (Oryza sativa L.) dynamic ...Open Access Research Paper
Micro RNAs (miRNAs) are small non-coding RNAs molecules having approximately 18-25 nucleotides, they are present in both plants and animals genomes. MiRNAs have diverse spatial expression patterns and regulate various developmental metabolisms, stress responses and other physiological processes. The dynamic gene expression playing major roles in phenotypic differences in organisms are believed to be controlled by miRNAs. Mutations in regions of regulatory factors, such as miRNA genes or transcription factors (TF) necessitated by dynamic environmental factors or pathogen infections, have tremendous effects on structure and expression of genes. The resultant novel gene products presents potential explanations for constant evolving desirable traits that have long been bred using conventional means, biotechnology or genetic engineering. Rice grain quality, yield, disease tolerance, climate-resilience and palatability properties are not exceptional to miRN Asmutations effects. There are new insights courtesy of high-throughput sequencing and improved proteomic techniques that organisms’ complexity and adaptations are highly contributed by miRNAs containing regulatory networks. This article aims to expound on how rice miRNAs could be driving evolution of traits and highlight the latest miRNA research progress. Moreover, the review accentuates miRNAs grey areas to be addressed and gives recommendations for further studies.
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
3. CONTENTS
1. INTRODUCTION.
2.PHYSICAL CHARACTERISTICS.
3.ABIOTIC CHARACTERISTICS.
4.ADAPTATIONS IN SUB TROPICAL DESERTS.
5.WORLDWIDE LOCATIONS: CONTINENTS HAVING
SUB TROPICAL DESERTS.
6.PLANT LIFE IN SUB TROPICAL DESERTS.
7.ANIMAL LIFE IN SUB TROPICAL DESERTS.
8.FOOD WEB IN SUBTROPICAL DESERTS.
4. INTRODUCTION
TROPICAL DESERTS:
Tropical deserts are in regions between 5- and 30-degrees latitude.
Environment is very extreme. They have the highest average monthly
temperature on Earth. Rainfall is sporadic; precipitation may not be
observed at all in a few years.
In addition to these extreme environmental and climate conditions, most
tropical deserts are covered with sand and rocks, and thus too flat and
lacking in vegetation to block out the wind. Wind may erode and transport
sand, rocks and other materials; these are known as eolian processes.
Landforms caused by wind erosion vary greatly in characteristics and size.
Representative landforms
include depressions and pans, Yardangs, inverted
topography and ventifacts.
5. SUB – TROPICAL DESERTS:
A subtropical desert is a type of ecosystem, or biome that is characterized by
high temperatures, very low precipitation and warm soils. Examples of these
types of deserts are the Mojave, Sonoran, Chihuahua, Sahara and the Great
Victoria Deserts.
Subtropical deserts, which exist between 15° and 30° north and south latitude,
are centered on the Tropics of Cancer and Capricorn. In some years,
evaporation exceeds precipitation in this very dry biome. Subtropical hot
deserts may have daytime soil surface temperatures above 60°C (140°F) and
nighttime temperatures approaching 0°C (32°F). In cold deserts, temperatures
may be as high as 25°C (77°F) and may drop below -30°C (-22°F). Subtropical
deserts are characterized by low annual precipitation of fewer than 30 cm (12
in), with little monthly variation and lack of predictability in rainfall. In some
cases, the annual rainfall can be as low as 2 cm (0.8 in), such as in central
6. PHYSICAL CHARACTERISTICS
Subtropical desert’s warm, with average annual temperatures above 10 C and
precipitation up to 100 cm (about the length of a baseball bat)/year.
Most of the Subtropical Deserts are located at 30ONorthor South latitude; this is
where air that was warmed at the equator falls back to the ground as cool, dry air
(losing its water as it rises wet and steamy over the equator). These dry winds dry the
land except for areas which are wetted by onshore breezes from warm offshore waters,
such as the Gulf coast of the United States or the eastern coast of Indochina.
Due to high evaporation of water in deserts, clay soils form the driest habitats as
water is kept close to the surface by capillary action and thus prone to evaporation.
Sandy soils offer better water supplies, and rocky and fissured soils provide the
wettest habitat.
Some desert areas haven't received a single drop of rain in hundred of years!
7. The region is characterized by dry-desert vegetation, a class of
xerophytic plants that are widely dispersed and provide negligible
ground cover.
In dry periods, visible vegetation is limited to small hard-leaved or
spiny shrubs, cacti, or hard grasses.
Many species of small annuals may be present, but they appear only
after the rare but heavy rains have saturated the soil.
There are relatively few large mammals in deserts because most are
not capable of storing sufficient water and withstanding the heat.
Deserts often provide little shelter from the sun for large animals.
The dominant animals of warm deserts are nonmammalian
vertebrates, such as reptiles.
Mammals are usually small, like the kangaroo mice of North American
deserts.
8. ABIOTIC CHARACTERISTICS
Temperature
Tropical deserts have the highest average daily temperature on the planet, as both the
energy input during the day and the loss of heat at night are large. This phenomenon
causes an extremely large daily temperature range. Specifically, temperatures in a low
elevation inland desert can reach 40°C to 50°C during the day, and drop to
approximately 5°C at night; the daily range is around 30 to 40°c
There are some other reasons for significant changes in temperature in tropical
deserts. For instance, a lack of water and vegetation on the ground can enhance the
absorption of the heat due to insolation. Subsiding air from dominant high pressure
areas in a cloud-free sky can also lead to large amounts of insolation; a cloudless sky
enables day temperature to escape rapidly at night.
9. Precipitation
Precipitation is very irregular in tropical deserts. The average annual
precipitation in low latitude deserts is less than 250 mm. Relative humidity is
very low only 10% to 30% in interior locations. Some deserts do not have
rainfall all year round, because they are located far from the ocean. High-
pressure cells and high temperatures can also increase the level of aridity.
Wind
Wind greatly contributes to aridity in tropical deserts. If wind speed exceeds 80
km/h, it can generate dust storms and sandstorms and erode the rocky surface.
Therefore, wind plays an important role in shaping various landforms. This
phenomenon is known as the eolian process. There are two types of eolian
process: deflation and abrasion.
10. First, deflation may cause the light lowering of ground
surface, leading to deflation hollows, plains, basins, blowouts,
wind-eroded plains and parabolic dunes. Second, the eolian
process leads to abrasion, which forms special landforms
with a significant undercut.
Soil:
The soil in Subtropical Deserts is either sandy or
coarse and rocky. But either way it is very dry which
makes supporting plant life very difficult.
11. Plants and animals in subtropical
deserts must be able to withstand
the hot temperatures and lack of
moisture. Shrubs and small trees in
the subtropical desert usually have
leaves adapted to retain moisture.
Animals in subtropical deserts are
usually active at night, when it is
cooler.
ADAPTATIONS OF SUB TROPICAL DESERT
13. Locations of the five subtropical desert cities: Beer Sheva,
Israel; Hotan, China; Jodhpur, India; Kharga, Egypt; Las
Vegas, NV, USA.
14. PLANT LIFE IN SUB - TROPICAL
DESERTS
• The most common plants in sub
tropical deserts are cacti, spiny,
shrubs, hard grass species
• Plants in sub tropical deserts
must be equipped to withstand the
high temperatures and lack of
moisture. Many of the shrubs
usually have leaves which have
adapted to lock in moisture.
•
15. Desert environment is usually not best suited for subtropical plants
-Subtropical plants grow well in fertile, decomposed ,deep loam soil.
They will not survive in locations with poor drainage.
-Xerophytes (dry loving plants) are common
Creosote bush: Open scraggly shrub
-Elephant trees: Stores water in spongy wood in trunk
-Therophytes (annuals via seeds)
Geophytes (survive under ground)
-Cactus (commonly found in deserts)
Desert annuals(The soil contains a "seedbank. “Many annual shave
hard seed coats of variable thickness)
16. ANIMAL LIFE IN SUB –
TROPICAL DESERTS
• Most animals who live in
Subtropical Deserts are nocturnal.
It is very hard to survive due to the
arid conditions. Many of the
animals are cold blooded.
• Many animals, such
as camels, tortoises, birds, foxes, r
odents and lizards, also live-in
subtropical deserts. A prime
example of a subtropical desert is
the Grand Canyon region, the
Mojave Desert or Sonoran Desert.
17. FENNEC FOXES:
have thick fur on feet protecting them from the hot ground;
have large, bat-like ears radiate body heat and help keep them
cool;
have long, thick hair that insulates them during cold nights and
protects them from the hot sun during the day;
have light coloured fur to reflect sunlight and keep their bodies
cools.
SPOTTED HYENA :
• They are good swimmers and can walk under water!
• They can make over 10 different sounds, but the most sound is the
laughing noise they make – therefore they are also called laughing
hyenas.
• They eat animals like zebra and wild beasts.
• They can survive in various types of environment, including dry
climates.
18. KANGAROO RAT
getting moisture from their seed diet;
living in burrows during the day to avoid extreme
heat;
having large back legs that allow them to jump
almost 3m to avoid predators;
having large ears, which enables them to hear
approaching predators
OSTRICHES:
• They may not be able to fly, but they are the largest
and fastest running birds in the entire world!
• They will eat pretty much anything if they have to,
but mostly plants, grass and seeds.
• They don’t drink very much that helps them survive
in dry climates.
19. CAMELS
have humps to store fat which a camel can break down into water and
energy when food is not available;
rarely sweat, even in hot temperatures.
have large, tough lips enable them to pick at dry and thorny desert
vegetation;
have broad, flat, leathery feet to spread their weight and provide
protection from hot sand.
20. FOOD WEB IN SUB - TROPICAL DESERTS
• A food web is the natural interconnection of food chains and a graphical representation of
what-eats-what in an ecological community.
• In a food chain in our Sub tropical desert region – as in a food chain in any other
biologically distinctive region, or “biome,” on earth – it is the plants, or the “producers,” that
capture the energy from the sun and initiate the flow, becoming the first link in the chain.
• In an almost magical-seeming process called “photosynthesis,” which means “gathering of
light,” all plants – from one-celled diatoms to mesquite and creosote shrubs to the
towering saguaro cactus to riverside cottonwoods and willows – use the sun’s energy, with
water and carbon dioxide, to produce a carbohydrate, or sugar, called “glucose,” a basic
component in the food chain.
• The plants then use the glucose to produce the carbohydrates, proteins and fats required
for reproduction and growth, drawing nourishment from various soil nutrients, for instance,
nitrogen, phosphorus and potassium.
• As producers, the plants, in effect, create storehouses of solar energy, setting the dinner
table, often impoverished in the desert, for the animals, the consumers