Question

biodiversity hotspots standard: sev2. obtain, evaluate, and communicate information to construct explanations of stability and change in earth’s ecosystems. d. construct an argument to support a claim about the value of biodiversity in ecosystem resilience including keystone, invasive, native, endemic, indicator, and endangered species. learning target: we will explain why biodiversity is important to ecosystem resilience objective: today you will research how important biodiversity is to ecosystems 1. first choose a hotspot to research polynesia and micronesia western ghats of sri lanka california floristic province philippines new zealand new caledonia mesoamerica indo-burma sundaland tropical andes eastern afromontane and coastal forest of tanzania and kenya choco-darien and western ecuador mediterranean basin central chile succulent karoo atlantic forest region guinea forest of west africa brazilian cerrado madagascar and indian ocean islands mountains of south central china southwest australia caribbean caucasus 2. second research a. give how many different plant species exist here b. give how many different animal species exist here c. describe in 2 complete sentence the regions rare species of i. 2 plants ii. 2 animals d. what continent is this ecosystem located on? e. what biome is this ecosystem within? f. what threats this ecosystem g. what conservation efforts are being done to protect this ecosystem’s biodiversity? h. one interesting fact about your ecosystem 3. third draw it: a. include a colorful drawing that represents your biodiversity hotspot answers (to research questions)

Answer:

To solve this problem, we'll focus on the Madagascar and Indian Ocean Islands biodiversity hotspot (from the table) and answer the sub - questions:

Sub - question 2a: Number of Plant Species

Step 1: Research Plant Species

The Madagascar and Indian Ocean Islands hotspot has a large number of plant species. It is known to have over 14,000 vascular plant species. Among these, more than 90% are endemic (found nowhere else on Earth). For example, the genus Adansonia (baobabs) has several endemic species here, and the Ravenala madagascariensis (traveler's palm) is also endemic. So, we can say there are at least 14,000 different plant species (with a very high proportion being endemic).

Sub - question 2b: Number of Animal Species

Step 1: Research Animal Species

• Mammals: There are around 200 mammal species, with over 90% being endemic. Examples include the ring - tailed lemur (Lemur catta), indri (Indri indri), and fossa (Cryptoprocta ferox).
• Birds: There are about 280 bird species, with over 50% being endemic. The Madagascar fish - eagle (Haliaeetus vociferoides) and the hoopoe - like elephant bird (now extinct) are notable, with the extant endemic birds like the Madagascar paradise - flycatcher (Terpsiphone mutata).
• Reptiles: There are over 400 reptile species, with a very high endemic rate (around 90%). Chameleons like the panther chameleon (Furcifer pardalis) and the tiny Brookesia chameleons are endemic.
• Amphibians: There are over 200 amphibian species, almost all endemic. The tomato frog (Dyscophus antongilii) is a well - known endemic amphibian.

Summing up the major groups (and considering other invertebrates etc. which add many more), we can say there are thousands of different animal species, with mammals (≈200), birds (≈280), reptiles (≈400), and amphibians (≈200) being some of the key groups with high endemism.

Sub - question 2c: Rare Species Description

Step 1: Choose Plant and Animal Species

• Plant (Rare): The Talinum nocturnum is a rare plant in this hotspot. It has a very limited distribution, often found in specific microhabitats like rocky outcrops in the dry forests of Madagascar. It has succulent - like leaves and small, delicate flowers. Due to habitat loss from deforestation for agriculture and logging, its population has declined significantly.
• Animal (Rare): The Madagascar pochard (Aythya innotata) is a rare bird. It was thought to be extinct for many years until a small population was rediscovered. It inhabits freshwater lakes in Madagascar. Habitat degradation (pollution, sedimentation of lakes) and introduced predators like rats have threatened its survival, making it one of the rarest ducks in the world.

Sub - question 2d: Continent of the Ecosystem

The Madagascar and Indian Ocean Islands ecosystem is located on the continent of Africa. Madagascar is an island off the southeastern coast of Africa, and the other islands in the Indian Ocean associated with this hotspot (like the Comoros, Mauritius, etc.) are also in the African region (biogeographically related to Africa).

Sub - question 2e: Biome of the Ecosystem

The biome of the Madagascar and Indian Ocean Islands hotspot is mainly tropical dry forest and tropical rainforest, with some areas of spiny forest (in southern Madagascar). The tropical dry forests have distinct wet and dry seasons, with trees that are adapted to drought (like deciduous trees that lose their leaves in the dry season). The tropical rainforests (in the eastern part of Madagascar) are lush, with high rainfall and a dense canopy, supporting a vast array of plant and animal life. The spiny forest is a unique biome with succulent and spiny plants adapted to the arid conditions in the south.

Sub - question 2f: Threats to the Ecosystem

• Deforestation: Large - scale logging (both legal and illegal) for timber and to clear land for agriculture (like rice cultivation and cattle grazing) has destroyed a significant portion of the natural forests. For example, the eastern rainforests have been reduced in size due to logging for valuable hardwoods.
• Agricultural Expansion: Slash - and - burn agriculture (known as tavy in Madagascar) is a traditional practice that has led to the conversion of forested areas into agricultural land. This not only destroys habitats but also leads to soil erosion and loss of soil fertility in the long run.
• Invasive Species: Species like the black rat (Rattus rattus), feral cats, and the Indian mongoose have been introduced to the islands. These invasive species prey on native wildlife, especially ground - nesting birds, small mammals, and reptiles. For example, the black rat has been a major threat to the eggs and young of many endemic bird species.
• Climate Change: Changes in rainfall patterns (more intense droughts or floods) are affecting the delicate balance of the ecosystems. In the dry forests, more severe droughts can lead to increased tree mortality, and in the rainforests, changes in rainfall can disrupt the reproductive cycles of plants and animals that are adapted to specific moisture conditions.

Sub - question 2g: Conservation Efforts

• Protected Areas: The establishment of national parks and reserves like Ranomafana National Park, Andasibe - Mantadia National Park, and the Masoala National Park. These areas are managed to protect the natural habitats, with measures like anti - poaching patrols, habitat restoration, and research on the native species.
• Community - Based Conservation: Programs that involve local communities in conservation efforts. For example, in some areas, local people are trained as eco - guards to protect the forests from illegal logging and poaching. Also, sustainable use projects like ecotourism are promoted, where local communities benefit from the presence of tourists (through jobs in lodges, guiding, etc.) while also being incentivized to protect the environment.
• Captive Breeding and Reintroduction: For rare species like the Madagascar pochard, captive breeding programs have been initiated. The goal is to breed the species in captivity and then reintroduce them into the wild once the threats in their natural habitats are managed. Similarly, for some rare plant species, seed banks and propagation programs are in place to ensure their survival.
• Invasive Species Control: Efforts to control invasive species, such as trapping and removing feral cats and rats from key habitats. In some island reserves, intensive rat eradication programs have been carried out to protect ground - nesting birds.

Sub - question 2h: Interesting Fact

One interesting fact about the Madagascar and Indian Ocean Islands biodiversity hotspot is that it is home to the world's largest chameleon, the Parson's chameleon (Calumma parsonii), which can grow up to 68 cm in length. Also, Madagascar is often referred to as the "eighth continent" because of its high level of endemism (a large proportion of its species are found nowhere else on Earth), with over 90% of its reptiles, 80% of its plants, and 70% of its mammals being endemic.

Sub - question 3a: Drawing Description (Text - based for Guidance)

To draw a colorful representation of the Madagascar and Indian Ocean Islands biodiversity hotspot:

• Background: Draw a map - like outline of Madagascar and some of the surrounding Indian Ocean islands (like Mauritius, Comoros) in light blue to represent the ocean.
• Habitats:
• For the tropical rainforest (eastern Madagascar), draw dense, green canopies with large, broad - leaved trees. Add colorful birds like the Madagascar paradise - flycatcher (with its long, white tail feathers) perched on the branches, and lemurs (like the ring - tailed lemur with its distinctive black - and - white ringed tail) jumping between the trees.
• For the tropical dry forest (western Madagascar), draw trees with more spaced - out canopies, some with bare branches (to show the dry season adaptation) and some with green leaves. Add chameleons (like the panther chameleon with its bright, multicolored body) on the tree trunks, and fossa (a cat - like mammal) prowling on the forest floor.
• For the spiny forest (southern Madagascar), draw spiny plants like the octopus tree (Didierea madagascariensis) with its spiky branches, and add the tomato frog (with its bright red color) near a small water source.
• Color Scheme: Use bright greens for the forests, various shades of brown for the tree trunks and soil, bright colors for the animals (like the red of the tomato frog, the blue and green of the chameleon, the black - and - white of the ring - tailed lemur), and light blue for the ocean. Add a legend to label the different habitats and key species.