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What might disrupt ecosystem processes? - Rawlins A
What might disrupt ecosystem processes? - Rawlins A

...  This poses a huge threat to ecosystems  Why is there movement?  Alien or exotic species may become established at any trophic level in the ecosystem  What features do these species share in order to survive in an alien environment? ...
The problem with invasive species
The problem with invasive species

... Natural rate: 1 established introduction every 100,000 years After Polynesians: 1 established introduction every 50,000 years Since Europeans: 1 established introduction every 0.25 years, or 4 per year ...
Bioassessment of Water Quality
Bioassessment of Water Quality

... Biodiversity Loss More than 400 of the over 1,300 species currently protected under the Endangered Species Act, and more than 180 candidate species for listing are considered to be at risk at least partly due to displacement by, competition with, and predation by invasive species USFWS ...
Wanted Poster - Spring Branch ISD
Wanted Poster - Spring Branch ISD

... Invasive species are organisms that are not naturally found in a specified location, in other words they are non-native. These organisms tend to take over their new habitat causing other, native species to have to compete for resources, often unsuccessfully. Native species are easily displaced and c ...
Includes interspecific interactions
Includes interspecific interactions

... Chapter 54 Community Ecology ...
NAME ______ANSWER KEY CH. 15/16 STUDY GUIDE
NAME ______ANSWER KEY CH. 15/16 STUDY GUIDE

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Understanding Our Environment

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How do geological processes and climate change affect evolution?
How do geological processes and climate change affect evolution?

... • It is by NATURAL SELECTION and also called as SPECIATION. • SPECIATION- it is a process where a specie splits into 2 or more different kinds of species. ...
Threats to marine biodiversity in the Mediterranean
Threats to marine biodiversity in the Mediterranean

... The anthropogenic and climate actions can combine their effects and man is now directly influencing the climate. Air and seas are warning due to increased atmosphere dioxide content as result of anthropic activities. So climate change can no more be considered of natural origin alone. The increased ...
Exam 4 Review - Iowa State University
Exam 4 Review - Iowa State University

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10.4 Reading Guide
10.4 Reading Guide

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Biology Notes: Ecology
Biology Notes: Ecology

... 2. What are two reasons that populations will increase?__________________________ , ________________________  3. What are two reasons that populations will decrease?_________________________ , ________________________  4. What are factors that control population growth called? ______________________ ...
Use of DDT - Lincoln-Sudbury Regional High School
Use of DDT - Lincoln-Sudbury Regional High School

... – Prohibits catching or killing of protected animals, prohibits uprooting of protected plants on Federal land. Prohibits sale or trade of any part of a protected species – Prohibits Federal Gov’t. from carrying out any project that jeopardizes an endangered species – Requires US Fish & Wildlife to p ...
Chapter 54 – Community Ecology Ecological Niche
Chapter 54 – Community Ecology Ecological Niche

... Herbivory  (+/– interaction)  Herbivore eats parts of a plant or algae  Symbiosis o Relationship where two species live in direct & intimate contact together o Parasitism  (+/– interaction)  Parasite gets nutrients from host, which is harmed (not killed)  Parasite can also use host’s energy  ...
Human impacts on ecosystems
Human impacts on ecosystems

...  Human activity has caused biodiversity to decrease at ...
Human impacts on ecosystems
Human impacts on ecosystems

...  Human activity has caused biodiversity to decrease at ...
3.2 Adapting to environment
3.2 Adapting to environment

... It is closely linked to primary productivity, which is the amount of energy provided by the producers in an ecosystem. A greater number of producers can support a more complex and diverse community of consumers. The greatest biodiversity on Earth occurs in tropical rainforests, where primary product ...
Activity One
Activity One

... competition against, displace or kill out native species or can reduce animal& mammals food and habitats. Some also have the potential to disrupt vital ecosystem functions, such as the flow of water, nutrient cycling, or soil decomposition. Other invasive species cause massive amounts of economic da ...
Mapping and modeling weed risk expansion
Mapping and modeling weed risk expansion

... GIS mapping technology is a powerful tool to model weed species distribution. In this study, we chose a number of weeds that are resistant to herbicides and modeled their distribution, in two countries, Greece and Germany, differing in their bioclimatic conditions. Weed species are harmful for the c ...
OB59 - OB64
OB59 - OB64

... meadow with a variety of grasses and clovers as well as weeds has a high biodiversity. There are many reasons why biodiversity is important but they can be divided into three categories: Usefulness, “we need it”, Aesthetic, “I like it” and Ethical, “It exists”. There are thought to be about 10 milli ...
Conservation and Restoration
Conservation and Restoration

...  Rate of extinction underlies the biodiversity crisis A. The Three Levels of Biodiversity 1. Genetic Diversity a) genetic variation within and b/w populations b) if one population becomes extinct then a species may have lost some of the genetic diversity that makes microevolution possible 2. Specie ...
BI101SQ Ch40
BI101SQ Ch40

... c. The community is likely to become more diverse, as strong and weak competitors can then coexist. 2. A habitat is best defined as: a. the home or location where an organism lives. b. the occupation of the organism in the ecosystem in which it resides. c. all the organisms and their nonliving envir ...
Amphibian decline case study
Amphibian decline case study

...  Caused by habitat fragmentation and loss in summer and wintering areas Overexploitation  37% of all endangered, vulnerable and rare species of vertebrates are threatened by overexploitation  Fur-bearing animals (giant otter, most species of cats)  Elephants (for ivory)  All species of rhinocer ...
Interactions in Ecosystems - Salisbury Composite High School
Interactions in Ecosystems - Salisbury Composite High School

... Threatened – species may become endangered if threatening conditions are not reversed Extirpated – a species no longer exists in one particular area, but is still found in other areas Endangered – a species is close to extinction in all parts of their natural habitat Extinct – a species no longer ex ...
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Bifrenaria



Bifrenaria, abbreviated Bif. in horticultural trade, is a genus of plant in family Orchidaceae. It contains 20 species found in Panama, Trinidad and South America. There are no known uses for them, but their abundant, and at first glance artificial, flowers, make them favorites of orchid growers.The genus can be split in two clearly distinct groups: one of highly robust plants with large flowers, that encompass the first species to be classified under the genus Bifrenaria; other of more delicate plants with smaller flowers occasionally classified as Stenocoryne or Adipe. There are two additional species that are normally classified as Bifrenaria, but which molecular analysis indicate to belong to different orchid groups entirely. One is Bifrenaria grandis which is endemic to Bolívia and which is now placed in Lacaena, and Bifrenaria steyermarkii, an inhabitant of the northern Amazon Forest, which does not have an alternative classification.
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