Why was this law unsuccessful in stopping the spread of fire ant colonies?
People were unaware of the federal law and, when they moved, transported plants bearing fire ant colonies; a single mated queen can be transported without being noticed
; and many states thought to be free of fire ant colonies already had them.
What is the cause of the red color of the waters about Madagascar?
For astronauts looking down on Madagascar from the International Space Station, the rivers are one of the more eye-catching sights. The waters are often a rusty red due to heavy loads of suspended sediment. … They pick up large amounts of sediment there, often from the iron-rich red soils and rocks called laterites.
What is occurring in the region around the Chilkat River in Alaska that allows chum salmon to spawn during the winter months?
What is occurring in the region around the Chilkat River in Alaska that allows chum salmon to spawn during the winter months?
Thermal springs heat and break up the ice
. When many bald eagles are concentrated within a small region, their feeding behavior usually involves __________.
Which of the following is the most likely result of the American toad's becoming extirpated from this forest?
Which of the following is the most likely result of the American toad's becoming extirpated from this forest?
Spiders are likely to experience a population increase
because more insect prey would become available.
What percent of the planet species found on Madagascar are unique to that island?
Isolated in the Indian Ocean off the coast of southern Africa, about
70%
of the estimated 250,000 species found on the island exist nowhere else on the globe.
Which of these terms applies to the relationship between the human and the deer?
Which of these terms applies to the relationship between the human and the deer? (
The human is the predator and the deer is the prey
.)
Which of the following is an example of a major threat to biodiversity?
the genetic diversity within and between populations of a species. … carrying an exotic species that could damage North American ecosystems. The three greatest current threats to biodiversity, in order starting with the greatest, are.
habitat loss, invasive species, and overharvesting
.
Are salmon edible after spawning?
Fishes in general, including salmon,
do not taste good after spawning
, mainly because they do not have much fat. Not all fish will die after spawning, though wild salmons die, mainly from exhaustion and not feeding. To eat them after death is your personal preference.
Why do salmon jump out of the water?
The reason, according to a new study, is that
they're infested with sea lice—and are trying to splash them off
. Researchers already suspected that salmon leap to dislodge sea lice, a pea-size parasite that feeds on mucus, blood, and skin. … Jumping out of the water isn't a risk-free proposition for the salmon.
Why do salmon stop eating in freshwater?
“Salmon stop feeding as they enter fresh water. Their stomach is no longer needed and it begins to disintegrate internally — leaving more room for the developing eggs and sperm.” “Salmon stop eating and drinking when they enter fresh water, because
the lack of salt water is a shock to their systems
.
What moves through the community from one trophic level to another as organisms feed on one another?
as organisms feed on one another,
matter and energy
move through the community from one trophic level, or rank in the feeding hierarchy, to another. consists of secondary consumers, which prey on primary consumers. each trophic level contains about 10% of the energy of the trophic level below it.
What is species occurring in only one area?
Endemic species
—species that are only found in one particular location—are also found in hotspots. All of the Earth's species work together to survive and maintain their ecosystems.
What two factors exert the greatest influence over a terrestrial biome?
Temperature and moisture
are the two climatic factors that most affect terrestrial biomes.
What threatens Madagascar?
- Deforestation and habitat destruction.
- Agricultural fires.
- Erosion and soil degradation.
- Overexploitation of living resources including hunting and over-collection of species from the wild.
- Introduction of alien species.
Why does Madagascar have unique species of plants and animals?
Because of Madagascar's geographic isolation
, many groups of plants and animals are entirely absent from the island. … Their descendants underwent dwarfing and evolved into species unique to the island. This distinctive biodiversity is a result of Madagascar's geographic isolation.
What is the geographical problem of Madagascar?
Madagascar's major environmental problems include:
Deforestation and habitat destruction
; Agricultural fires; Erosion and soil degradation; Over exploitation of living resources including hunting and over-collection of species from the wild; Introduction of alien species.
What is the term for the concept that two species Cannot occupy the same ecological niche simultaneously and continuously?
The concept that two species cannot occupy the same ecological niche simultaneously and continuously is called:
the competitive exclusion principle
.
What are the causes for threat to biodiversity?
- Human Activities and Loss of Habitat: …
- Deforestation: …
- Desertification: …
- Marine Environment: …
- Increasing Wildlife Trade: …
- Climate Change:
What is the process by which two interacting species act on one another as agents of natural selection?
In biology,
coevolution
occurs when two or more species reciprocally affect each other's evolution through the process of natural selection. The term sometimes is used for two traits in the same species affecting each other's evolution, as well as gene-culture coevolution.
Which species interaction applies to bees that harvest nectar and pollen from flowers?
Pollination is one of the commonest forms of
mutualism
between plants and animals
1 , 2 , 3 , 4
. Angiosperms produce flowers with nectar and ample pollen to attract flower-visitors; in return, the flower-visitors transport pollen and effect pollination, so producing seeds.
What are the main causes of threat to species in India?
- Deforestation. …
- Habitat Loss. …
- Poaching. …
- Hunting. …
- Road Kill. …
- Rail Track. …
- Electric Fence – Electrocuted. …
- Plastic Pollution.
What is the biggest threat to the loss of biodiversity essay?
Habitat Fragmentation
Habitat loss from exploitation of resources, agricultural conversion, and urbanization
is the largest factor contributing to the loss of biodiversity. The consequent fragmentation of habitat results in small isolated patches of land that cannot maintain populations of species into the future.
Do male salmon lay eggs?
A number of fishes, however, are born males, but change into females; or are born females and change into males. Many fish, including trout and salmon, are oviparous. This means
they lay eggs
. … The male, during this season, usually develops a hooked snout and a humped back.
Can you eat red Kokanee?
Kokanee is
best eaten just before the spawning stage
. Their flesh is the dazzling bright orange that many anglers long for, and it is richer in flavor than trout but softer than other salmon. If the fish is longer than 12 inches, you can fillet it. You can also butterfly it or gut-and-grill it.
Why is salmon pink?
The flesh of all salmon, irrespective of their origin – farmed or wild – is a pink colour
because they consume a carotenoid antioxidant that comes from their diet
. Carotenoids are a naturally occurring group of pigments that pass on colour to the tissue of a variety of organisms.
How do bears eat salmon?
They use their claws and teeth to tear and eat
their prey
. … Sometimes, it only eats the most nutrient-rich parts of the fish and discards the remaining parts. Brown bears that feed on salmon are usually the largest in size.
Can salmon bite you?
Can Salmon Bite Humans? Outright attacks by salmon on e.g.
swimmers have literally never been reported
, as salmon aren't the most aggressive or territorial of fish species. On the other hand, plenty of anglers have been bitten or cut by salmon teeth while trying to unhook a fish or examine its mouth and teeth.
Do pink salmon eat eggs?
This much should come as no surprise as salmon are often caught as they mouth skein or spawn bags on an angler's hook. Salmon obviously
have a taste for their own eggs
(or the eggs of other salmon, at least), but in some cases, they actually digest and derive energetic benefits from egg predation.
Do salmon have teeth?
However, contrary to popular belief,
all five species of Pacific salmon actually have teeth
, some of which can be pretty darn sharp! As salmon begin to break down upon entering fresh water, their gums also start to recede, often unveiling a mouth full of sticky-sharp teeth.
Do Salmons Leap?
There are records of salmon leaping at least 12 feet in their determination to ascend waterfalls
. Those who have seen these prodigious feats will know how the fish almost seems to fly rather than jump. A leaping fish in two elements, air and water!
How long does salmon take to grow?
Once in sea water, salmon continue their development until they become adult salmon. This step takes
between 14 and 24 months
.
Why can many different species coexist and thrive in areas close to the equator?
Why can many different species coexist and thrive in areas close to the equator?
Equatorial climatic conditions discourage any one species from dominating the ecosystem and encourage biodiversity
. … Biodiversity can be measured at different levels including genetic diversity, species diversity, and ecosystem diversity.
What factor has the greatest influence on the type of ecosystem?
The abiotic condition that exerts the greatest influence on biome classification, particularly terrestrial biomes, is
climate
.
What two abiotic components have the greatest influence on biome plant life composition and influence where a biome is located?
Temperature and precipitation
, and variations in both, are key abiotic factors that shape the composition of animal and plant communities in terrestrial biomes. Some biomes, such as temperate grasslands and temperate forests, have distinct seasons with cold and hot weather alternating throughout the year.
What happens to the energy that is not transferred from one trophic to the next?
The amount of energy at each trophic level decreases as it moves through an ecosystem. As little as 10 percent of the energy at any trophic level is transferred to the next level; the rest is lost largely through
metabolic processes as heat
.
Why does the amount of energy moving through a food chain declines as trophic level increases?
Energy decreases as it moves up trophic levels
because energy is lost as metabolic heat when the organisms from one trophic level are consumed by organisms from the next level
. … A food chain can usually sustain no more than six energy transfers before all the energy is used up.
Is diagrammatic representation showing how the energy travels up in the food chain through different trophic levels?
Answer:
Ecological pyramids
show the relative amounts of various parameters (such as number of organisms, energy, and biomass) across trophic levels. Ecological pyramids can also be called trophic pyramids or energy pyramids.
Are pandas specialists?
Pandas are an excellent example of
a herbivore specialist
, because they have a specific niche that they live in and their diet consists only of bamboo.
How many species are there on Earth in 2021?
We have identified and described over two million species on Earth. Estimates on the true number of species varies. The most widely-cited estimate is
8.7 million species
(but this ranges from around 5 to 10 million).
What animal is King Julien?
Ring tailed lemurs
are probably the most well-known of all the different types of lemur because King Julien from the Madagascar films is one. Ring tailed lemurs spend more than a third of their time on the ground, more than any other lemur species.
Why is Madagascar a hotspot?
While our planet is a wonderland of wildlands, there are few places as spectacular as Madagascar, a Biodiversity Hotspot. …
Madagascar is home to thousands of endemic plants and animals found nowhere else on the planet that have evolved over the 90
million years that it has been secluded from the rest of the world.
