CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the reference to our firm under the caption "Experts - AmSouth Funds", in the Combined Proxy Statement of AmSouth Funds and Prospectus for Pioneer Short Term Income Fund ("Combined Proxy Statements and Prospectus"), and to the incorporation by reference of our report dated September 29, 2004, with respect to the financial statements and financial highlights of the AmSouth Limited Term Bond Fund, included in the AmSouth Funds Annual Report for the year ended July 31, 2004, in the Combined Proxy Statements and Prospectus included in this Registration Statement on Form N-14 of the Pioneer Short Term Income Fund. We further consent to the references to us under the heading "Representations and Warranties" (paragraph 4.1(f)) in the Agreement and Plan of Reorganization included as Exhibit A to the Combined Proxy Statements and Prospectus. We also consent to the references to our firm under the captions "Independent Registered Public Accounting Firm" and "Financial Statements" in the AmSouth Funds Statement of Additional Information, and to the incorporation by reference of our report, dated September 29, 2004, on the financial statements and financial highlights of AmSouth Limited Term Bond Fund included in the AmSouth Funds Annual Report for the year ended July 31, 2004, in Post-Effective Amendment No. 43 to the Registration Statement (Form N-1A, 1933 Nos. 33-21660) of the AmSouth Funds, as filed with the Securities and Exchange Commission on December 1, 2004 (Accession No. 0000898432-04-000999), which is incorporated by reference into the Combined Proxy Statements and Prospectus included in this Registration Statement on Form N-14 of the Pioneer Short Term Income Fund. /s/ ERNST & YOUNG LLP Columbus, Ohio June 29, 2005 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the references to our firm under the captions " Financial Highlights" and "Experts - Pioneer Funds", in the Combined Proxy Statement of AmSouth Funds and Prospectus for Pioneer Short Term Income Fund ("Combined Proxy Statements and Prospectus"), and to the incorporation by reference of our report dated October 1, 2004, with respect to the financial statements and financial highlights of Pioneer Short Term Income Fund, included in the Annual Report to the Shareowners for the year ended August 31, 2004, in the Combined Proxy Statements and Prospectus included in this Registration Statement on Form N-14 of the Pioneer Short Term Income Fund. We further consent to the reference to us under the heading "Representations and Warranties" (paragraph 4.2(g)) in the Agreement and Plan of Reorganization included as Exhibit A to the Combined Proxy Statements and Prospectus. We also consent to the references to our firm under the captions "Independent Registered Public Accounting Firm" and "Financial Statements" in the Pioneer Short Term Income Fund Statement of Additional Information, and to the incorporation by reference of our report, dated October 1, 2004, on the financial statements and financial highlights of Pioneer Short Term Income Fund included in the Annual Report to the Shareowners for the year ended August 31, 2004, in Post-Effective Amendment No. 1 to the Registration Statement (Form N-1A, 1933 No. 333-114423), as filed with the Securities and Exchange Commission on December 6, 2004 (Accession No. 0001016964-04-000483), which is incorporated by reference into the Combined Proxy Statements and Prospectus included in this Registration Statement on Form N-14 of the Pioneer Short Term Income Fund. /s/ ERNST & YOUNG LLP Boston, Massachusetts June 29, 2005