Invasive Species
Nonnative organisms known as invasive species pose a threat to the ecosystem balance of a
habitat when they are introduced to an area outside of their natural range. As seen in Figure 170, the
United States is home to a large number of these species. You have probably come across an invasive
species while taking a walk down a city street, taking a summer boat trip, or taking a hike through a
fores
135
.
135
Clark M.,Choi, J. Douglas M. (2020)
Biology 2e
. Chapter 45. - Pp.1322-1323. OpenStax,
https://openstax.org/details/books/biology-2e
)
247
Figure 170.
In the United States, invasive species like (a) purple loosestrife (Lythrum salicaria) and the (b)
zebra mussel (Dreissena polymorpha) threaten certain aquatic ecosystems. Some forests are threatened by
the spread of (c) common buckthorn (Rhamnus cathartica), (d) garlic mustard (Alliaria petiolata), and (e) the
emerald ash borer (Agrilus planipennis). The (f) European starling (Sturnus vulgaris) may compete with
native bird species for nest holes
136
.
Reading #3: Global Sustainable Development
The Sustainable Development Goals (SDGs), also known as the Global Goals, were adopted
by the United Nations in 2015 as a universal call to action to end poverty, protect the planet, and
ensure that by 2030 all people enjoy peace and prosperity.
The 17 SDGs are integrated—they recognize that action in one area will affect outcomes in others,
and that development must balance social, economic and environmental sustainability.
Countries have committed to prioritize progress for those who're furthest behind. The SDGs
are designed to end poverty, hunger, AIDS, and discrimination against women and girls.
The creativity, knowhow, technology and financial resources from all of society is necessary to
achieve the SDGs in every context
137
.
136
(credit a: modifi cation of work by Liz West; credit b: modification of work by M. McCormick, NOAA; credit c:
modification of work by E. Dronkert; credit d: modification of work by Dan Davison; credit e: modification of work by
USDA; credit f: modification of work by Don DeBold)
137
Source: (
https://www.undp.org/sustainable-development-goals
)
|