e-journal

Phosphorus limitation, soil-borne pathogens and the coexistence of plant species in hyperdiverse forests and shrublands

---

Hyperdiverse forests occur in the lowland tropics, whereas the most species-rich shrublands are
found in regions such as south-western Australia (kwongan) and South Africa (fynbos). Despite
large differences, these ecosystems share an important characteristic: their soils are strongly
weathered and phosphorus (P) is a key growth-limiting nutrient. Soil-borne pathogens are
increasingly being recognized as drivers of plant diversity in lowland tropical rainforests, but have
received little attention in species-rich shrublands. We suggest a trade-off in which the species
most proficient at acquiring P have ephemeral roots that are particularly susceptible to soil-borne
pathogens. This could equalize out the differences in competitive ability among co-occurring
species in these ecosystems, thus contributing to coexistence. Moreover, effective protection
against soil-borne pathogens by ectomycorrhizal (ECM) fungi might explain the occurrence of
monodominant stands of ECM trees and shrubs amongst otherwise species-rich communities.
We identify gaps in our knowledge which need to be filled in order to evaluate a possible link
between P limitation, fine root traits, soil-borne pathogens and local plant species diversity. Such
a linkmayhelp to explainhownumerous plant species can coexist in hyperdiverse rainforests and
shrublands, and, conversely, how monodominant stands can develop in these ecosystems.

Key words: alpha diversity, Janzen–Connell hypothesis, kwongan, monodominance, mycorrhizal fungi, negative density dependence (NDD), plant–soil feedback, tropical rainforest.

---

Ketersediaan

Tidak ada salinan data

Informasi Detail

Judul Seri

New Phytologist

No. Panggil

-

Penerbit

: New Phytologist Trust., 2015

Deskripsi Fisik

New Phytologist (2015) 206: 507–521

Bahasa

English

ISBN/ISSN

-

Klasifikasi

-

Tipe Isi

-

Tipe Media

-

Tipe Pembawa

-

Edisi

(2015) 206: 507–521

Subjek

ILMU PENYAKIT TUMBUHAN

Info Detail Spesifik

-

Pernyataan Tanggungjawab

agus

Versi lain/terkait

Lampiran Berkas

Komentar

---

Anda harus masuk sebelum memberikan komentar